GOLD AND SILVER MINES.[4]

DIAMOND WASHING IN BRAZIL.

On the heap of earth, at equal distances, three high chairs are placed for the overseers, who are no sooner seated than the negroes enter the troughs, each provided with a rake of a peculiar form, and having a short handle, with which he rakes into the trough from fifty to eighty pounds’ weight of the earth. The water being then allowed to pass in by degrees, the earth is spread abroad, and continually raked up to the head of the trough, so as to be kept in constant motion. This operation is continued for a quarter of an hour, when the water begins to run clearer; and, the earthy particles having been washed away, the gravel-like matter is raked up to the end of thetrough. At length the current flowing quite clear, the largest stones are thrown out, and afterward those of an inferior size; the whole is then examined with great care for diamonds. When a negro finds one, he instantly stands upright, and claps his hands; he then extends them, holding the gem between the fore-finger and the thumb. An overseer receives it from him, and deposits it in a bowl, suspended from the center of the structure, and half filled with water. In this vessel all the diamonds found in the course of the day are deposited, and at the close of the work are taken out and delivered to the principal overseer, who, after they have been weighed, registers the particulars in a book kept for that purpose.

When a negro is so fortunate as to find a diamond of the weight of seventeen carats and a half, the following ceremony takes place: he is crowned with a wreath of flowers, and carried in procession to the administrator, who gives him his freedom by paying his owner for it. He also receives a present of new clothes, and is permitted to work on his own account. For small stones proportionate premiums are given; while many precautions are taken to prevent the negroes from stealing the diamonds, with which view they are frequently changed by the overseers, lest these precious gems should be concealed in the corners of the troughs. When a negro is suspected of swallowing a diamond, he is confined in a solitary apartment, and means taken to bring the gem to light.

In the East Indies, the kingdom of Golconda, extending two hundred and sixty miles along the bay of Bengal, and having a breadth of two hundred miles from east to west, abounds in diamond mines. They are chiefly in the vicinity of the rocky hills and mountains which intersect the country, and in the whole of which diamonds are supposed to be contained. In several of the mines they are found scattered in the earth, within two or three fathoms of the surface, and in others are met with in a mineral substance in the body of the rocks, forty or fifty fathoms deep. The laborers having dug five or six feet into the rock, soften the stone by fire, and proceed till they find the vein, which often runs two or three furlongs under the rock. The earth being brought out and carefully searched, affords stones of various shapes, and of a good water. This earth is of a yellowish, and sometimes of a reddish color, frequently adhering to the diamond with so strong a crust that the separation becomes difficult.

To find the diamonds, the workmen form a cistern of a kind of clay, with a small vent on one side, a little above the bottom; in this vent they place a plug, and throwing into the cistern the earth they have dug, pour in water to dissolve it. They then break the clods, and stir the wet earth in the cistern, allowing the lighter part to be carried off in the form of mud, whenthe vent-hole is opened to let out the water. They thus continue washing, until what remains in the cistern is pretty clean; and then, in the middle of the day, when the sun shines bright, carefully look over all the sand, at which practice they are so expert, that the smallest stone can not escape them. The brightness of the sun being reflected by the diamonds, aids them in their research, which would be foiled if a cloud were to intervene.

The largest known diamond was found in Brazil, and belongs to the king of Portugal. It weighs sixteen hundred and eighty carats; and, although uncut, it is valued at the enormous sum of two hundred and twenty-four millions sterling, which gives an estimate of nearly eighty pounds sterling for each carat, the multiplicand of the square of its whole weight being taken. The one next in magnitude and value, is probably that mentioned by Tavernier, in possession of the Great Mogul. It was found in Golconda in 1550; is of the size of half a hen’s egg, and is said to weigh nine hundred carats. This diamond is the same as the famous “Koh-i-noor,” or “Mountain of Light,” now belonging to the queen of England, and which attracted so much attention in the great exhibition at London, in 1851. The one supposed to be next in value, is that belonging to the crown jewels of Russia, which weighs seven hundred and seventy-nine carats, and has been estimated at five millions sterling. But perhaps the most perfect and beautiful diamond hitherto found, is the one known as the Pitt diamond, which was brought from India by a gentleman of that name, who sold it to the Duke of Orleans for one hundred thousand pounds sterling. It was worn by Bonaparte in the hilt of his sword. It weighs about one hundred and thirty-six carats, or five hundred and forty-four grains. It ought, however, to be observed, that these estimates, founded on the magnitude and brilliancy of the gems, are very different from the prices which the most princely fortunes can afford to pay for them. The Russian diamond cost about one hundred and thirty five thousand pounds sterling; and the one called the Pitt or Regent, although it weighed one hundred and thirty-six carats only, was, on account of its greater brilliancy, purchased of a Greek merchant, for one hundred thousand pounds sterling. Several other large diamonds are preserved in the cabinets of the sovereigns and princes of Europe.

Why such immense value should be attached to diamonds, in all civilized countries, and by a kind of common consent, is one of those singular things that seem inexplicable. That a magnificent house, with a large estate, and the means of living not only in comfort but splendor, should be set in competition with, and even deemed inadequate to the purchase of, a transparent crystallized stone, not half the size of a hen’s egg, seems almost a kind ofinsanity! If for the mere consciousness of possessing a diamond of less than the weight of an ounce, any private gentleman were to pay four hundred and fifty thousand dollars in ready money, and an annuity of twenty thousand dollars besides, he would probably be thought beside himself. And yet not only was the above sum given, but a patent of nobility into the bargain, by the empress Catharine, of Russia, for the famous diamond “Nadir Shah.” In this case, however, though the seller acquired much, the purchaser did not suffer any personal privation; and in reality, notwithstanding the costliness and high estimation of diamonds, they are not put in competition with the substantial comforts and conveniences of life. Among ornaments and luxuries, however, they unquestionably occupy, and have ever occupied, the highest rank. Even Fashion, proverbially capricious as she is, has remained steady in this, one of her earliest attachments, during probably three or four thousand years. There must be, therefore, in the nature of things, some adequate reason for this universal consent; which becomes a curious object of inquiry.

The utility of the diamond, great as it is in some respects, enters for little or nothing into the calculation of its price; at least all that portion of its value which constitutes the difference between the cost of an entire diamond and an equal weight of diamond powder, must be attributed to other causes.

The beauty of this gem, depending on its unrivaled luster, is, no doubt, the circumstance which originally brought it into notice, and still continues to uphold it in the public estimation; and certainly, notwithstanding the smallness of its bulk, there is not any substance, natural or artificial, which can sustain any comparison with it in this respect. The vivid and various refractions of the opal, the refreshing tints of the emerald, the singular and beautiful light which streams from the six-rayed star of the girasol, the various colors, combined with high luster, which distinguish the ruby, the sapphire, and the topaz, beautiful as they are on a near inspection, are almost entirely lost to a distant beholder; whereas the diamond, without any essential color of its own, imbibes the pure solar ray, and then reflects it, either with undiminished intensity, too white and too vivid to be sustained for more than an instant by the most insensible eye, or decomposed by refraction into those prismatic colors, which paint the rainbow, and the morning and evening clouds, combined with a brilliancy which hardly yields to that of the meridian sun. Other gems, inserted into rings and bracelets, are best seen by the wearer; and if they attract the notice of the bystanders, divide their attention, and withdraw those regards which ought to be concentered on the person, to the merely accessory ornaments. The diamond, on thecontrary, whether blazing on the crown of state, or diffusing its starry radiance from the breast of titled merit, or “in courts of feasts and high solemnities,” wreathing itself with the hair, illustrating the shape and color of the neck, and entering ambitiously into contest with the lively luster of those eyes that “rain influence” on all beholders, blends harmoniously with the general effect, and proclaims to the most distant ring of the surrounding crowd, the person of the monarch, of the knight, or of the beauty.

Another circumstance tending to enhance the value of the diamond is, that although small stones are sufficiently abundant to be within the reach of moderate expenditure, and therefore afford, to all those who are in easy circumstances an opportunity to acquire a taste for diamonds, yet those of a larger size are, and ever have been, rather rare; and of those which are celebrated for their size and beauty, the whole number, at least in Europe, scarcely amounts to half a dozen, all of them being in possession of sovereign princes. Hence, the acquisition even of a moderately large diamond, is what mere money can not always command; and many are the favors, both political and of other kinds, for which a diamond of a large size, or of uncommon beauty, may be offered as a compensation, where its commercial price, in money, neither can be tendered, nor would be received. In many circumstances also, it is a matter of no small importance for a person to have a considerable part of his property in the most portable form possible; and in this respect what is there that can be compared to diamonds, which possess the portability, without the risk of bills of exchange? It may further be remarked, in favor of this species of property, that it is but little liable to fluctuation, and has gone on pretty regularly increasing in value, insomuch that the price of stones of good quality is considerably higher than it was some years ago.

The art of cutting and polishing diamonds, has a twofold object; first, to divide the natural surface of the stone in a symmetrical manner by means of highly polished polygonal planes, and thus to bring out, to the best advantage, the wonderful refulgence of this beautiful gem; and, secondly, by cutting out such flaws as may happen to be near the surface, to remove those blemishes which materially detract from its beauty, and consequently from its value. The removal of such flaws is a matter of great importance; for, owing to the form in which the diamond is cut, and its high degree of refrangibility, the smallest fault is magnified, and becomes obtrusively visible to all. For this reason, also, it is by no means an easy matter, at all times, to ascertain whether a flaw is or is not superficial; and a person with a correct and well-practiced eye, may often purchase to great advantage,stones which appear to be flawed quite through, but which are in fact only superficially blemished.

Before leaving the subject of diamonds, it may be well to notice some other valuable stones that are much sought and prized for ornament. One of these is theoriental ruby. This, in its most esteemed color, is pure carmine, or a blood-red of considerable intensity, forming, when well polished, a blaze of the most exquisite and unrivaled tint. It is, however, more or less pale, and mixed with blue in various proportions; and hence it occurs rose-red, and reddish-white, crimson, peach-blossom red, and lilac-blue, the latter variety being named theoriental amethyst. It is a native of Pegu, and is said to be found in the sand of certain streams near the capital of the country; and it also occurs, with the sapphire, in the sands of the rivers of Ceylon. A ruby which is perfect both in color and transparency, is much less common than a good diamond; and when of the weight of three or four carats, is even more valuable than a diamond of the same size. The king of Pegu, and the monarchs of Asia and Siam, monopolize the finest rubies, in the same way as the sovereigns of India make a monopoly of diamonds. The finest ruby in the world is in possession of the first of these kings. Its purity has passed into a proverb, and its worth, when compared with gold, is inestimable. The dubah of Deccan, also, possesses a remarkably fine one, which is a full inch in diameter. The princes of Europe can not boast of any rubies of first-rate magnitude.

Theoriental sapphireranks next in value to the ruby. When it is perfect, its color is a clear and bright Prussian blue, united to a high degree of transparency. Theastoriaorstar-stone, is a remarkable variety of this beautiful gem: it is semi-transparent, with a reddish purple tinge. And beside these, there are theredsapphire, often called the oriental ruby, and theyellowsapphire, which is called the oriental topaz. And in addition to these precious stones, or gems, there are also theemerald, of a beautiful green color; thetopaz, which is of a yellow or light wine-color, and which by being heated, sometimes becomes rose-red, so as to be passed off as a ruby; thejasperandchalcedony, which are of various colors; theonyx, which is a regularly banded agate, much prized for cameos, especially where the colors are very distinct and different; thecornelian, which is properly a red or flesh-colored chalcedony, much valued for seal-stones, &c.; and theblood-stone, orheliotrope, which is deep green, and somewhat translucent, and variegated by blood-red spots: all of which are much used in the various departments of jewelry.

We have reserved for this place, a notice of the hot-well at Clifton, England, which would have been mentioned in connection with the Geysers and otherhot springs, but from its connection with the beautiful crystals known asBristol stonesordiamonds, some of which are so hard as to cut glass, and are exceedingly clear, colorless and brilliant. When set in rings, in their natural state, these stones often appear of as high a polish and luster, as if they had been wrought by the most skillful lapidary.

The warm spring, or fountain, in the vicinity of which they are found, is called thehot-well. It is in the parish of Clifton, and is so copious as to discharge sixty gallons of water in a minute. It rises forcibly from an opening in the solid rock, at about twenty-six feet below high-water mark. On its immediate influx from the rock, the water is much warmer than when it is pumped up for drinking, for it is raised by pumps some thirty feet. Its qualities in a medicinal point of view are supposed to be valuable; but it is not on this point that we propose to dwell, and therefore we pass on to the rocks in the neighborhood, near which theBristol stonesare found. Just below the hot-well, there rises a noble range of hills, which are not more remarkable for their hight, than for their being equally so on both sides the river, the strata in some places answering on each side for about a mile and a half in a serpentine course. These constitute one of the greatest natural curiosities in England. The rock beyond the hot-well, and on the same side, is named St. Vincent’s, a chapel dedicated to that saint having been formerly built on its summit. It is in hight three hundred feet, and has a majestic appearance. It supplies the naturalist with many curious fossils, the botanist with a variety of scarce plants, the antiquary with the remains of a Roman camp, and the less curious inquirer with a view of a most dreadful and surprising precipice.

The rocks in general, when broken up, are of a dusky red, brown or chocolate colored marble, very hard and close-grained, and which, on being struck with a hammer, emit a strong sulphureous smell. It will bear a polish equal to any foreign marble; and, when sawed into slabs and polished, appears beautifully variegated with veins of white, bluish-gray, or yellow. It is often employed for chimney-pieces; but it is principally used for making lime, for which purpose there is no stone in England so well calculated, nor is there any lime so strong, fine, and white, which excellent qualities occasion great demand for foreign consumption.

Here, and in the vicinity, laborers are daily employed in blowing up the rocks with gunpowder, by which process vast fragments are frequently thrown down, and repeatedly strike the precipice with a dreadful crash, which, combined with the loud report of the explosion, reëchoed from side to side by the lofty cliffs, makes a noise resembling thunder, for which it is frequently mistaken by strangers. It is the opinion of the greater part ofthose who have viewed these rocks, that they were once united, and were separated by some terrible convulsion of nature. A bridge of one arch, from rock to rock, over the Avon, has long been in contemplation; but if the blowing up of these rocks should still be persisted in, the design will be rendered impracticable. This is the more to be regretted, because stone of the same quality is to be procured lower down the river.

Now it is in the fissures and cavities of these rocks, that the beautiful crystals calledBristol stones, ordiamonds, already mentioned, are found. They are clear and brilliant, and being without color, so richly and brilliantly reflect the light, as to be almost next to the diamond in appearance, and are often palmed off on the unpracticed for the latter gem. They are extensively used in many of the plainer kinds of jewelry, and when set over gold-leaf, or thin paper of delicate tinges, are often made closely to resemble some of the richest gems known.

The mines of La Plata, so denominated on account of the abundance of silver they contain, are chiefly situated in the provinces which were formerly attached to the Spanish viceroyalty of Rio de la Plata; but which, since the South American states revolted from the mother country, have been included in the republic of Bolivia, or Upper Peru as it is sometimes called. With the exception of Mexico, Bolivia is the richest country in silver which has yet been discovered, and contains innumerable mines both of that metal and of gold. All its northern provinces teem with mineral opulence; and those of Laricaja and Carabaya, have been distinguished by the production of the latter, and still nobler metal, in its virgin state. In consequence, however, of the recent political convulsions, mining, once the richest source of revenue, is in a depressed state; many of the mines being filled with water and totally neglected.

4. The account of the mines of South America and Mexico is mostly from Humboldt, and as will be obvious to the reader, has reference in many things to their past history and progress, rather than to their present condition.

The mountain of Potosi formerly produced weekly about five thousand marks of silver, that is, from thirty to forty thousand dollars; a surprising produce, when it is considered that it has been wrought since 1545, at which time it was accidentally discovered by an Indian, or native, as represented in the cut. In hunting some goats, he slipped from a slight elevation, and to save himself caught hold of a shrub, which coming away from theground, laid bare the silver at its root. At the commencement it was still more abundant, and the metal was dug up in a purer state.

DISCOVERY OF SILVER IN PERU.

The silver was often found in shoots like roots, imbedded in the earth. Six thousand Indians were sent every eighteen months, from the provinces of the viceroyalty, to work this mine. The expedition was calledmita; and these Indians, having been enrolled and formed into parties, were distributed by the governor of Potosi, and received a small daily stipend, (equal to about thirty-four cents of our currency,) until the period of their labor was completed. They were thus doomed to a forced service, nothing less than slavery, so long as it lasted, which the Spaniards have endeavored to justify by the plea that laborers could not otherwise be procured.

Lumps of pure gold and silver, calledpapas, from their resemblance to the potato, were often found in the sands. The poor likewise occupied themselves inlavaderos, or in washing the sands of the rivers and rivulets, in order to find particles of the precious metals.

To compensate for the mines rendered useless by the irruption of water,or other accidents, rich and new ones were daily discovered. They were all found in the chains of mountains, commonly in dry and barren spots, and sometimes in the sides of thequebredas, or astonishing precipitous breaks in the ridges. However certain this rule might be in the region of Bolivia, it was contradicted in that of Peru, where, at three leagues’ distance from the Pacific ocean, not far from Tagna, in the province of Arica, there was discovered the famous mine of Huantajaya, in a sandy plain at a distance from the mountains, of such exuberant wealth that the pure metal was cut out with a chisel. From this mine a large specimen of virgin silver is preserved in the royal cabinet of natural history at Madrid. It attracted a considerable population, although neither water nor the common conveniences for labor could be found there, neither any pasturage for the cattle.

In the mint of Potosi, about six millions of dollars were annually coined; and the mines of the old viceroyalty of La Plata, taken collectively, are reckoned to have yielded about sixteen millions.

The mines of Mexico, or what was formerly called New Spain, have been more celebrated for their riches than those of La Plata, notwithstanding which they are remarkable for the poverty of the mineral they contain. A quintal, or sixteen hundred ounces of silver ore, affords, at a medium, not more than three or four ounces of pure silver, about one-third of what is yielded by the same quantity of mineral in Saxony. It is not, therefore, on account of the richness of the ore, but from its abundance and the facility of working it, that these mines have been so much superior to those of Europe.

The fact of the small number of persons employed in working them, is not less contrary to the commonly received opinion on this subject. The mines of Guanaxuato, infinitely richer than those of Potosi ever were, afforded from 1706 to 1803, nearly forty millions of dollars in gold and silver, or very nearly five millions of dollars annually, being somewhat less than one-fourth of the whole quantity of gold and silver from New Spain; notwithstanding which, these mines, productive as they were, did not employ more than five thousand workmen of every description. In Mexico, the labor of the mines was perfectly free, and better paid than any other kind of industry, a miner earning from five to five dollars and a half weekly, while the wages of the common laborer did not exceed a dollar and a half. Thetenateros, or persons who carried the ore on their backs, from the spot where it was dug out of the mine, to that where it was collected in heaps, had a sum equal to a dollar and ten cents for a day’s work of six hours. Neither slaves, criminals, nor forced laborers, were employed in the Mexican mines.

In consequence of the clumsy, imperfect and expensive mode of clearingthem from water, several of the richest of these mines have been overflowed and abandoned; while the lack of method in the arrangement of the galleries, and the absence of lateral communications, have added to the risk, and greatly increased the expense of working them. Labor has not been, as in the working of the European mines, abridged, nor the transportation of materials facilitated. When new works were undertaken, a due consideration was not bestowed on the preliminary arrangements; and they were always conducted on too large and expensive a scale.

More than three-fourths of the silver obtained from America is extricated from the ore by means of quicksilver, the loss of which, in the process of amalgamation, is immense. The quantity that used to be consumed annually in Mexico alone, was about sixteen thousand quintals; and in the whole of South America, about twenty-five thousand quintals were yearly expended, the cost of which there, has been estimated at more than a million dollars. The greater part of this quicksilver, in later years, was furnished by the mine of Almaden in Spain, and that of Istria in Carniola, the celebrated quicksilver mine of Huancavelica in Peru, having greatly fallen off in its produce since the sixteenth century, when it was highly flourishing. The prosperity of the silver mines, both in Mexico and Peru, therefore depended very much on the supplies of quicksilver from Spain, Germany and Italy; for such was the abundance of the ore in those provinces, that apparently the only limit to the amount of silver obtained there, was the want of mercury for amalgamation.

In taking a general view of the riches of the other portions of America, Humboldt, who has supplied these details, remarks that, in Peru, silver ore exists in as great abundance as in Mexico, the mines of Lauricocha being capable of yielding as great a produce as those of Guanaxuato; but that the art of mining, and the methods of separating the silver from its ore, are still more defective than in Mexico. Notwithstanding this imperfect system, the total amount of the precious metals annually furnished by America, was at one time estimated at upward of forty-two million dollars; the gold being in proportion to the silver as one to forty-six. From 1492 to 1803, the quantity of gold and silver extracted from the American mines, was equal in value to five billion, seven hundred and six million, seven hundred thousand dollars; of which immense sum, the portion carried to Europe, including the booty gathered by the conquerors of America, is estimated at five billion, four hundred and forty-five million dollars, averaging seventeen million and a half of dollars yearly. The annual importation up to 1803, being divided into six periods, appears to have constantly augmented, and in the following progressive ratio. From 1492 to 1500, it did not exceedtwo hundred and fifty thousand dollars. From 1500 to 1545, it amounted to three millions of dollars. From 1545 to 1600, to eleven millions. From 1600 to 1700, to sixteen millions. From 1700 to 1750, to twenty-two millions and a half. And, lastly, from 1750 to 1803, to the prodigious sum of thirty-five million, three hundred thousand dollars.

The first period was that of exchange with the natives, or of mere rapine. The second was distinguished by the conquest and plunder of Mexico, Peru and New Granada, and by the opening of the first mines. The third began with the discovery of the rich mines of Potosi; and in the course of it the conquest of Chili was completed, and various mines opened in Mexico. At the commencement of the fourth period, the mines of Potosi began to be exhausted; but those of Lauricocha were discovered, and the produce of Mexico rose from two millions to five millions of dollars annually. The fifth period began with the discovery of gold in Brazil; and the sixth was distinguished by the prodigious increase of the mines of Mexico, while those of every other part of America, with the exception of Brazil, were then constantly improving.

The gold mines of Brazil have been very productive. Those called general, were about seventy-five leagues from Rio Janeiro, the staple and principal outlet of the riches of the Brazilian territory. They formerly yielded to the king, annually, for his right of fifths, at least one hundred and twelve arobas (weighing twenty-five pounds each) of gold; so that their yearly produce might then have been estimated at upward of three and a half millions of dollars, and that of the more distant mines at about one-third the sum.

The gold drawn from them could not be carried to Rio Janeiro, without being first brought to the smelting-houses established in each district, where the right of the crown was received. What belonged to private persons was remitted in bars, with their weight, number, and an impression of the royal arms. The gold was then assayed, and its standard imprinted on each bar. When these bars were carried to the mint, their value was paid to the possessor in coin, commonly in half-doubloons, each worth eight Spanish dollars. Upon each of these half-doubloons the king gained a dollar, by the alloy and right of coinage. The mint of Rio Janeiro was one of the most beautiful in existence, and furnished with every convenience for working with the greatest celerity. As the gold came from the mines at the same time that the fleets came from Portugal, the operations of the mint and the coinage proceeded with surprising quickness.

In Africa, the kingdom of Mozambique abounds in gold, which is washed down by the rivers, and forms a chief part of the commerce of the country.The kingdoms of Monomotara and Sofala likewise furnish considerable quantities of gold; and the Portuguese residing in the latter territory, half a century ago, reported that it yielded annually two millions ofmetigals, equal to somewhat more than a million sterling. The merchants exported from Mecca, and other parts, about the same quantity of gold. The soldiers were paid in gold dust, in the state in which it was collected; and this was so pure, and of so fine a yellow, as not to be exceeded, when wrought, by any other gold beside that of Japan. Gold is likewise found on the island of Madagascar. The Gold Coast is so denominated from the abundance of gold found among the sands: it is not, however, so productive as has been generally supposed, owing to the intense heats, which, in a great measure, prevent the natives from prosecuting their researches.

In Asia, the island of Japan is most productive of gold, which is found in several of its provinces, and is, in by far the greater proportion, melted from its ore. It is also procured by washing the sands, and a small quantity is likewise found in the ore of copper. The emperor claims a supreme jurisdiction, not only over the gold mines, but over all the mines of the empire, which are not allowed to be worked without a license from him. Two-thirds of their produce belong to him, and the other third is left to the governor of the province in which the mines are situated. But the richest gold ore, and that which yields the finest gold, is dug in one of the northern provinces of the island of Niphon, a dependency of Japan, where the gold mines have, in past times, been highly productive, though now they have much fallen off. In the Japanese province of Tsckungo, a rich gold mine, having been filled with water, was no longer worked: as it was, however, so situated, that by cutting the rock and making an opening beneath the mine, the water could be easily drawn off, this was attempted. At the moment of beginning the operation, so violent a storm of thunder and lightning arose, that the workmen were obliged to seek shelter elsewhere; and these superstitious people imagining that the tutelar god and protector of the spot, unwilling to have the bowels of the earth thus rifled, had raised the storm to make them sensible of his great displeasure at such an undertaking, desisted from all further attempts, through the fear of incurring his displeasure, and could not be induced to go on with it.

Thibet, a mountainous country of India, contains a great abundance of gold, which is traced in the rivers flowing from that territory into the Ganges. In Hindoostan there are not any mines of gold; but in the Irnada district gold is collected in the river which passes Nelambur in the Mangery Talui, a nair having the exclusive privilege of this collection, for which he pays a small annual tribute. Silver is in general rare throughout theoriental regions, and there is not any indication of this metal in India; but in Japan there are several silver mines, more particularly in the northern provinces, and the metal extracted from them is very pure and fine.

Turning to Europe, Dalmatia is said in ancient times to have produced an abundance of gold. Pliny reports that in the reign of the emperor Nero, fifty pounds of this precious metal were daily taken from the mines of that province; and that it was found on the surface of the ground. It is added, that Vibius, who was sent by Augustus to subdue the Dalmatians, obliged that hardy and warlike people to work in the mines, and to separate the gold from the ore.

Bossina, in Sclavonia, contains many mineral mountains, and has rich mines of gold and silver. The district in which the latter are found, is named theSrebrarniza, being derived from the wordsrebr, which signifies silver in all the Sclavonian dialects. Their produce resembles the native silver of Potosi, and is found, combined with pure quartz, in small, thin leaves, resembling moss.

The kingdom of Norway formerly produced gold; but the expense of working the mines, and procuring the pure ore, being greater than the profit, these have been neglected. There are, however, silver mines, which are extremely valuable, and give employment to several thousands of persons. The principal of these is at Königsberg, and was discovered in 1623, when the town was immediately built, and peopled with German miners. In 1751, forty-one shafts and twelve veins, were wrought in this mine, and gave employment to thirty-five hundred officers, artificers and laborers. A view of one part of this mine is given in the cut on the next page.

The silver ore is not, as was at first imagined, confined to the mountain between Königsberg and the river Jordal, but extends its veins for several miles throughout the adjacent districts, in consequence of which new mines have been undertaken in several places, and prosperously carried on. One of the richest and most ancient of the mines, named “Old God’s blessing,” has sometimes, in the space of a week, yielded several hundred pounds’ weight of rich ore. The astonishing depth of this mine, which is not less than a hundred and eighty fathoms, perpendicularly, fills the mind of the beholder with amazement; and the circumference at the bottom forms a clear space of several hundreds of fathoms. Here the sight of thirty or forty fires, burning on all sides in this gloomy cavern, and continually fed to soften the stone in the prosecution of the labors, seems, according to the notions commonly entertained, an apt image of hell; and the swarms of miners, covered with soot, and bustling about in habits according to their several employments, may well remind one of so many evil spirits; moreespecially when, at a given signal that the mine is to be sprung in this or that direction, they exclaim aloud: “Berg-livet, berg-livet!” “Take care of your lives.”

SILVER MINE AT KÖNIGSBERG.

The gold mines of Cremnitz, in Hungary, lie forty miles south of the Carpathian hills; and twenty miles further to the south are the silver mines of Shemnitz. These are called mining towns; and the former is the principal, its rich ores being found in what is styled metallic rock. Its mines also produce a certain proportion of silver. Hungary is beside enriched by a mineral peculiar to itself, or one, at least, which has not hitherto been discovered elsewhere, namely, theopal, a gem preferred to all others by the oriental nations. The opal mines are situated at Ozerwiniza, where they are found in a hill consisting of decomposed porphyry, a few fathoms beneath the surface. Their produce is of various qualities, from the opaque-white, or semi-opal, to the utmost refulgence of the lively colors by which this noble gem is distinguished.

Transylvania and the Bannet, contain numerous and valuable mines, consisting chiefly of gray gold ore, and white gold ore. The finest gold is found at Olapian, not far from Zalathna, intermixed with gravel and sand. The sands of the Rhine, also, in various places contain traces of gold.

The mountains of Spain were, according to ancient writers, very rich in gold and silver; and accordingly Gibbon calls that kingdom, “the Peru and Mexico of the old world.” He adds, that “the discovery of the rich western continent of the Phenicians, and the oppression of the simple natives, who were compelled to labor in their own mines for the benefit of strangers, form an exact type of the more recent history of Spanish America.” The Phenicians were acquainted only with the sea-coasts of Spain; but avarice, as well as ambition, carried the arms of Rome and Carthage into the heart of the country, and almost every part of the soil was found pregnant with gold, silver and copper. A mine near Carthagena, is said to have yielded daily twenty-five thousand drams of silver, or over thirteen hundred thousand dollars a year. The provinces of Asturia, Gallicia and Lusitania, yielded twenty thousand pounds’ weight of gold annually: but rich as these mines are, the modern Spaniards have chosen rather to import the precious metals from America, than to seek them at home.

Portugal is in many parts mountainous; and these mountains contain, beside others, rich ores of silver. But the Portuguese, like the Spaniards, having been supplied with metals from South America, and particularly with an abundance of gold and silver from Brazil, have not worked the mines in their own country. Gems of all kinds, as turkoises and hyacinths, are also found in these mountains, together with beautifully variegated marbles, and many curious fossils.

But the richest and most productive gold mines of Europe, at the present time, are probably those of Russia. It had long been known that gold was to be found in the Russian dominions; but in 1829, Baron Humboldt, with two scientific associates, at the request of the emperor of Russia, made a mineralogical tour to the Ural and Altai mountains. In this journey, they not only discovered new localities of gold and silver, but from the geological features of the country suggested that, at certain localities, diamonds would also probably be found, which accordingly happened. And as the result of the report they made to the Russian government, mining operations were commenced on a large scale in these mountains, which have now become one of the most prolific gold regions in the world. The increase of these sources of gold, in extent and amount, has been such, that from the value of about ten thousand dollars in 1836, the amount received in 1843, was some eighteen millions of dollars; and the supply has since increasedannually, until at present, 1855, it amounts to about twenty million dollars a year. Most of this large amount of gold is gathered from washing the sand and loose earth, and not from deep mines; and as it is every year becoming greater and greater, it must add immensely to the wealth and resources of the Russian empire.

But by far the greatest gold-field in the world, has been opened by the discoveries of the last few years in California. At the close of the late war with Mexico, the United States acquired, by conquest and purchase, a tract of country of some five hundred thousand square miles in extent, known as the Mexican territory of upper California. And from the western portion of this region, Congress, in 1850, created and admitted into the American confederacy, the thirty-first state, under the name of California. It is almost superfluous to say, that California is one of the most important mineral regions in the world, particularly in its deposits of gold. Vague notions of the existence of this gold, had from time to time been spread abroad; but it was not till 1848, that an accident discovered the marvelous fact of its abundance. In that year, a Mr. Sutter, a native of Switzerland, was settled near the mouth of the American fork of the Sacramento river, at the head of navigation, one hundred and fifty miles from its mouth. Here he had founded New Helvetia, and obtained a grant of thirty miles round. He had sent some men to the upper part of the American fork, to clear out a mill-race. The soil was washed down in the process, and some shining scales laid bare. These proved to be gold, and on investigation, not only the valley of this stream, but the beds of all the other streams running into the Sacramento, were found to have a soil full of gold, in minute scales and in bits, from a grain to many ounces in weight. New “placers,” as the “washings,” or “dry diggings” are called, have constantly been discovered, and people have rushed to these hills from all quarters, with pans, tubs, pickaxes, shovels, hoes, filtering-machines, and energetic sinews, till they have extracted, by digging, washing, &c., millions on millions of dollars’ worth of the yellow treasure. Gold is now found over an extent of many hundred miles, and also on the Gila, and throughout the great central plateau, north and north-east of it.

In a favorable locality, the lucky finder of a placer will sift out hundreds of dollars’ worth in a day. Persons with not a shirt to their backs, and scarcely a whole garment upon them, are seen with bags of gold in their hands. Prices of everything went up at once to an enormous rate: laborer’s wages became eight or ten dollars a day; cooks at the diggings, ten dollars a day; clerks, fifteen hundred dollars to six thousand dollarsper annum, &c., &c. As all the productive industry of the country is now turnedto gold-digging, and as such vast numbers of consumers are flocking in from all parts, prices continue to range high for every article of necessity, although such large quantities of goods have been sent.

GOLD WASHING IN CALIFORNIA.

The gold first discovered was evidently not in its original place, but had been washed down from higher regions; and when all that is thus spread through the sands of California shall have been exhausted, if it ever shall be, there are large bodies of auriferous quartz, which (with greater labor and expense) will doubtless afford large supplies of gold for generations to come. The amount of capital invested in quartz-mining, according to the state census of 1852, was about six millions, and in placer and other mining operations, about four millions of dollars; and the sum total of these amounts has been greatly increased since that date. Up to the close of 1851, there had been deposited in the United States mint, $98,407,990 of California gold; and the deposits of 1852 amounted to $46,528,076, making a total of $145,000,000. But all this falls far short of the realamount produced; as probably quite as much more has been sent to Europe in the shape of dust or bullion, not to mention the unreported sums which have been privately taken out of the state. An official estimate states the production of American gold in 1853, at $109,156,748; and of this sum nearly the whole is from the mines of California. And this vast amount is steadily on the increase, in about the proportion of the increase of the mining population, so that California not only is, but is likely to continue to bethe great gold-fieldof the world.

Before leaving California, it may not be amiss to add, that the country abounds in mines of almost every kind, as well as gold. Quicksilver, plaster, lead, iron, silver, copper, asphaltum and marble, are found in Butte, and also in Marion county; rich silver mines and coal, in San Louis Obispo; copious salt springs, in Shasta; bituminous springs, in many places along the coast; hot sulphur springs, in Santa Barbara; warm soda springs, near Benicia; and platina is said to be widely distributed in almost every section where gold has been found. Silver has been discovered in several mines in the southern district; copper is widely distributed in other sections beside those above-mentioned; chromium occurs in large quantities in the serpentine rocks; and diamonds are reported to have been recently found in several localities.

PLACE WHERE GOLD WAS FIRST DISCOVERED IN AUSTRALIA.

At a date still later than the discovery of gold in California, the same precious metal was discovered in Australia. The cut on the following page gives a view of the place where it was first found, in the county of Bathurst, not far from Sydney in New South Wales. It is worthy of note that we owe the discovery of gold in Australia to the high state of geological science. Sir R. Murchison, in his address to the London Geographical Society in 1844, alluded to the possibly auriferous character of the great eastern chain of Australia, being led thereto by his knowledge of the auriferous chain of the Ural, and by his examination of Count Strzelecki’s specimens, maps and sections. Some of Sir R. Murchison’s observations having found their way to the Australian papers, a Mr. Smith, at that time engaged in some iron works at Berrima, was induced by them in the year 1849 to search for gold, and he found it. He sent the gold to the colonial government, and offered to disclose its locality on payment of five hundred pounds sterling. The government, however, not putting full faith in the statement, and being, moreover, unwilling to encourage a gold fever without sufficient reason, declined to grant the sum, but offered, if Mr. Smith would mention the locality, and the discovery was found to be valuable, to reward him accordingly. Very unwisely, as it turned out, Mr. Smith did not accept this offer; and it remained for Mr. Hargraves, who came with the prestige of hisCalifornia experience, to make the discovery anew, and get the reward from the English government on their own conditions. The first discovery was made in the banks of the Summer Hill creek and the Lewis Ponds river, small streams which run from the northern flank of the Conobalas down to the Macquarrie. The gold was found in the sand and gravel accumulated, especially on the inside of the bends of the brook, and at the junction of the two water-courses, where the stream of each would be often checked by the other. It was coarse gold, showing its parent site to be at no great distance, and probably in the quartz veins traversing the metamorphic rocks of the Conobalas. Mr. Stutchbury, the government geologist, reported on the truth of the discovery, and shortly afterward found gold in several other localities, especially on the banks of the Turon, some distance north-east of the Conobalas. This was a much wider and more open valley than the Summer Hill creek, and the gold accordingly was much finer, occurring in small scales and flakes. It was, however, more regularly and equably distributedthrough the soil, so that a man might reckon with the greatest certainty on the quantity his daily labor would return him. At the head of the Turon river, among the dark glens and gullies in which it collects its head-waters, in the flanks of the Blue mountains, the gold got “coarser,” occurred in large lumps or nuggets, but these were more sparingly scattered.

As already said, the discovery was made by Mr. Hargraves, in May, 1850; and before the end of June, there were more than twenty thousand persons at the mines. When it was known in the town of Bathurst, that the discovery had been made, and that the country, from the mountain ranges, back to an indefinite extent in the interior, was probably one immense goldfield, the excitement was intense and universal. A complete phrensy seemed to seize on the entire population; the business of the town was paralyzed; and there was a universal rush to the diggings. People of all trades, callings and pursuits were quickly transformed into miners; and many a hand which had been trained to kid gloves, or accustomed only to the quill, became nervous to clutch the pick or crowbar, or to “rock the cradle” at the newly discovered mines. The roads were literally alive with the crowds pressing on from every quarter, some armed with pickaxes, others shouldering crowbars and shovels, and not a few strung round with hand-basins, tin-pots and cullenders. Scores rushed from their homes, with only a blanket, and a pick or grubbing-hoe, full of hope that a few days would give them heaps of the precious metal. Everything at once rose in price, and the whole face of society was speedily changed in almost every aspect.

The first pieces found were in grains. Soon a piece was picked up weighing some eleven ounces; and soon after, several lumps weighing together about three pounds. Gold was speedily discovered in almost every place where it was looked for; in the beds of the streams, and in veins of quartz, in grains, in scales, and in lumps of various weights. Some, as might be expected, were successful, and some comparatively unsuccessful in seeking it; the great mass of the miners averaging not more than four or five dollars a day, while in some rare cases a single individual gathered to the value of a thousand dollars in the same time. Gold was soon discovered in the Wellington district, and in various other places. One piece was picked up weighing almost five pounds; and from a single cleft in a rock, a miner took out eleven pounds’ weight of gold, in separate pieces of various sizes. A Scotchman gathered fourteen hundred dollars’ worth in four days, and eight of his associates averaged from thirty to forty dollars’ worth a day. Apparently there is no end to the supply, at least for years to come; and all this within forty miles of a town where every comfort, not to say luxury, can be obtained, with a good post-road all the way to Sydney, and in themidst of tracts of the most fertile land, partly occupied, and where food may be supplied for millions of inhabitants, if needed. An official statement estimates the supply of Australian gold at sixty million dollars a year; and in addition to the gold, diamonds and platinum have also been found. Australia and California are likely to be the great sources of the supply of gold, compared with which all others will be relatively unimportant.

Before leaving the subject of gold, it may be interesting to the reader to trace the process of its coinage, which may thus be briefly stated. The metal, after being received in the deposit-room, is carefully weighed, and a receipt given. Each deposit is then melted separately in the melting-room, and molded into bars. These bars next pass through the hands of the assayer, who with a chisel chips a small fragment from each one. Each chip is then rolled into a thin ribbon, and filed down until it weighs exactly ten grains. It is then melted into a little cup made of calcined bone ashes, and all the base metals, copper, tin, &c., are absorbed by the porous material of the cup or carried off by oxydation. The gold is then boiled in nitric acid, which dissolves the silver which it contains, and leaves the gold pure. It is then weighed, and the amount which it has lost gives the exact proportion of impurity in the original bar, and a certificate of the amount of coin due the depositor is made out accordingly. After being assayed, the bars are melted with a certain proportion of silver, and being poured into a dilution of nitric acid and water, assume a granulated form. In this state the gold is thoroughly boiled in nitric acid, and rendered perfectly free from silver or any other baser metals which may happen to cling to it. It is next melted with one-ninth its weight of copper, and, thus alloyed, is run into bars, and delivered to the coiner for coinage. The bars are rolled out in a rolling-mill until nearly as thin as the coin which is to be made from them. By a process of annealing they are rendered sufficiently ductile to be drawn through a longitudinal orifice in a piece of steel, thus reducing the whole to a regular width and thickness. A cutting-machine next punches small round pieces from the bar, about the size of the coin. These pieces are weighed separately by the “adjusters,” and if too heavy are filed down; if too light they are melted again. The pieces which have been adjusted are run through a milling-machine, which compresses them to the right diameter and raises the edge. Two hundred and fifty are milled in a minute by the machine. They are then again softened by the process of annealing, and after a thorough cleaning are placed in a tube connecting with the stamping instrument, and are taken thence one at a time by the machinery, and stamped between the dies. They are now finished, and, being thrown into a box, are delivered to the treasurer for circulation. The machinery, ofcourse, for all those processes, must be of the nicest kind. When in full operation, a mint like that of England, or that of the United States at Philadelphia, can coin millions on millions in a year.

Quicksilver, or mercury, is the only metal which remains liquid at ordinary temperatures. It is white and very brilliant, as may be seen in common thermometers. It boils at six hundred and sixty degrees of heat; and freezes, and assumes a crystalline texture, at forty degrees below zero. It is extensively used in its various forms in the arts, and also for medicinal purposes. The thermometer and barometer illustrate some of its uses in its pure state; the backs of our common mirrors are covered with it, which gives them their reflecting power; it is used extensively in separating some of the purer metals from the mixtures with which they are found; and in some of its forms or combinations, it is the basis of calomel, corrosive sublimate, vermilion, &c.

Mercury is found in various parts of the world. Among its principal mines are those of Almaden, near Cordova, in Spain, and of Idria, near Carniola, in Austria; though it is also found in Peru, California, Italy and China. Formerly most of the quicksilver came from Germany; but more recently the largest production is probably in Spain. So extensively is it used, that in 1831, over three hundred thousand pounds were brought from the continent into England; and for the fourteen years ending in 1828, the imports of it into Canton, by the English and Americans, averaged nearly six hundred and fifty thousand pounds a year, worth some three hundred and fifty thousand dollars.

Of all the quicksilver mines, those of Idria, mentioned above, are some of the most interesting, and demand a particular description, as they have been celebrated in natural history, poetry and romance. The ban of Idria, is a district of Austria, lying west of Carniola. The town, which is small, is seated in a deep valley, amid high mountains, on the river of the same name, and at the bottom of so steep a descent, that its approach is a task of great difficulty, and sometimes of danger.

The mines were discovered in 1497, before which time that part of the country was inhabited by a few coopers only, and other artificers in wood, with which the territory abounds. One evening, a cooper having placed a new tub under a dropping spring, to try if it would hold water, on returning the next morning, found it so heavy that he could scarcely move it. He atfirst was led by his superstition to suspect that the tub was bewitched; but spying, at length, a shining fluid at the bottom, with the nature of which he was unacquainted, he collected it, and proceeded to an apothecary at Laubach, who, being an artful man, dismissed him with a small recompense, requesting that he would not fail to bring him further supplies. From this small beginning, the product of these mines has steadily increased; and now might easily be made six hundred tuns per year, though to uphold the price of the metal, the Austrian government has restricted the annual production to one hundred and fifty tuns. In 1803, a disastrous fire took place in these mines, which was extinguished only by drowning all the underground workings. The mercury, sublimed by the heat in this catastrophe, occasioned diseases and nervous tremblings in more than nine hundred persons in the neighborhood.

The subterraneous passages of the great mine are so extensive, that it would require several hours to pass through them. The greatest perpendicular depth, computing from the entrance of the shaft, is eight hundred and forty feet; but as these passages advance horizontally, under a high mountain, the depth would be much greater if the measure were taken from the surface. One mode of descending the shaft is by a bucket, but as the entrance is narrow, the bucket is liable to strike against the sides, or to be stopped by some obstacle, so that it may be readily overset. A second mode of descending, which is safer, is by means of a great number of ladders, placed obliquely, in a kind of zigzag: as the ladders, however, are wet and narrow, a person must be very cautious how he steps, to prevent his falling. In the course of the descent, there are several resting-places, which are extremely welcome to the wearied traveler. In some of the subterraneous passages, the heat is so intense as to occasion a profuse sweat; and in several of the shafts the air was formerly so confined, that several miners were suffocated by an igneous vapor, or gaseous exhalation, called the fire-damp. This has been prevented by sinking the main shaft deeper. Near to it is a large wheel, and a hydraulic machine, by which the mine is cleared of water.

To these pernicious and deadly caverns, criminals are occasionally banished by the Austrian government; and it has sometimes happened that this punishment has been allotted to persons of considerable rank and family. The case of Count Alberti is an interesting instance of this kind.

The count, having fought a duel with an Austrian general, against the emperor’s command, and having left him for dead, was obliged to seek refuge in one of the forests of Istria, where he was apprehended, and afterward rescued by a band of robbers who had long infested that quarter. With these banditti he spent nine months, until, by a close investment of the placein which they were concealed, and after a very obstinate resistance, in which the greater part of them were killed, he was taken and carried to Vienna, to be broken alive on the wheel. This punishment was, by the intercession of his friends, changed into that of perpetual confinement and labor in the mines of Idria; a sentence which, to a noble mind, was worse than death. To these mines he was accompanied by the countess, his lady, who belonged to one of the first families in Germany, and who, having tried every means to procure her husband’s pardon without effect, resolved at length to share his miseries, as she could not relieve them. They were terminated, however, through the mediation of the general with whom the duel had been fought, who as soon as he recovered from his wounds, obtained a pardon for his unfortunate opponent; and Alberti, on his return to Vienna, was again taken into favor, and restored to his fortune and rank.

The metal which is called iron, is familiar to all, both for its value and its various uses. It is capable of being cast in molds of any form; of being drawn in wires, extended in plates or sheets, of being bent in every direction, and of being sharpened, hardened, or softened at pleasure. It accommodates itself to all our wants, desires, and even caprices; it is equally serviceable to the arts, the sciences, to agriculture, and to war; and the same ore furnishes the sword, the plowshare, the scythe, the pruning-hook, the needle, the graver, the spring of the watch or that of the carriage, the chisel, the chain, the anchor, the compass, the cannon, the bomb, the edge of the finest knife or razor, and the ponderous trip-hammer of enormous weight. It is a medicine of much virtue, and the only metal which is always useful, and tends to no injury to mankind.

The ores of iron are scattered over the entire crust of the globe in beneficent profusion, and in proportion to the utility of the metal itself: they are found in every latitude and zone, in every mineral formation, and in every soil and clime. These ores are nineteen in number, ten of which are worked to profit by the miner, either for the sake of the iron they contain, for use in their native state, or for extracting from them some principle or material, useful in manufactures or the arts.

Native iron, the existence of which was formerly questioned, has been found in several places: it is, however, far from being common, though it occurs in several mines. A mass of this description of iron was discovered in the district of Santiago del Estero, in South America, by a party ofIndians, in the midst of a widely extended plain. It projected about a foot above the ground, nearly the whole of its upper surface being visible; and the news of its having been found in a country where there are not any mountains, nor even the smallest stone, within the circumference of a hundred leagues, was considered as truly surprising. Although the journey was attended with great danger, on account of the want of water, and abundance of wild beasts in these deserts, several individuals, in the hope of gain, undertook to visit this mass; and, having accomplished their journey, sent a specimen of the metal to Lima and Madrid, where it was found to be very pure soft iron.

As it was reported that this mass was the extremity of an immense vein of the metal, a metallurgist was sent to examine the spot, and by him it was found buried in pure clay and ashes. Externally it had the appearance of very compact iron, but was internally full of cavities, as if the whole had been formerly in a liquid state. This idea was confirmed by its having, on its surface, the impression of human feet and hands of a large size, as well as that of the feet of a description of large birds, very common in South America. Although these impressions seemed very perfect, it was concluded either that they werelusus naturæ, or that impressions of this kind were previously on the ground, and that the liquid mass of iron, in falling on it, received them. It had the greatest resemblance to a mass of dough; which, having been stamped with impressions of hands and feet, and marked with a finger, had afterward been converted into iron.

On digging round the mass, the under surface was found covered with a coat of scoriæ from four to six inches thick, undoubtedly occasioned by the moisture of the earth, the upper surface being clean. No appearance of the formation of iron was observed in the earth, below or round it, for a great distance. About two leagues to the eastward was a brackish mineral spring, and a very gentle ascent of from four to six feet in hight, running from north to south: with this exception, the adjacent territory was a perfect level. About the spring, as well as near the mass, the earth was very light, loose, and greatly resembling ashes, even in color. The grass in the vicinity was very short, small, and extremely unpalatable to the cattle; but that at a distance was long, and extremely grateful to them. From these concurrent circumstances it was concluded, that this mass of native iron, which was estimated to weigh about three hundred quintals, was produced by a volcanic explosion. It is stated as an undoubted fact, that in one of the forests of the above district of Santiago del Estero, there exists a mass of pure native iron, in the shape of a tree with its branches. At a little depth in the earth are found stones of quartz, of a beautiful red color, which the honey-gatherers,the only persons who frequent this rude territory, employ as flints to light their fires. Several of these were selected on account of their peculiar beauty, they being spotted and studded, as it were, with gold: one of them, weighing about an ounce, was ground by the governor of the district, who extracted from it a dram of gold.

A fibrous kind of native iron has been found at Ebenstock, in Saxony, and also in Siberia, where one particular mass weighed sixteen hundred pounds. It resembled forged iron in its composition, and was malleable when cold, but brittle when red-hot. In Senegal, where it is most common, it is of a cubical form, and is employed by the natives in the manufacture of different kinds of vessels. Native meteoric iron, called also nickeliferous, from its containing nickel, and native steel iron, which has many of the characters of cast steel, have also been found.

Iron, although one of the imperfect metals, is susceptible of a very high polish, and more capable than any other metal of having its hardness increased or diminished by certain chemical processes. It is often manufactured in such a way as to beone hundred and fifty times, and, as will now be seen, in some cases, to be even abovesix hundred and thirty timesmore valuable than gold. On weighing several common watch-pendulum springs, such as are sold for ordinary work by the London artists, at half a crown, ten of them were found to weigh but one single grain. Hence one pound avoirdupois, equal to seven thousand grains, contains ten times that number of these springs, which amount, at half a crown each, to eight thousand, seven hundred and fifty pounds sterling. Reckoning the troy ounce of gold at four pounds sterling, and the pound equal to fifty-seven hundred and sixty grains, at forty-eight pounds sterling, the value of an avoirdupois pound of gold is over fifty-eight pounds sterling. The above amount of the value of the watch-springs weighing an avoirdupois pound, being divided by that sum, will give a ratio of somewhat more than one hundred and fifty to one. But the pendulum-springs of the best kind of watches sell at half a guinea each; and at this price the above-mentioned value is increased in the ratio of four and one-fifth to one; which gives an amount of thirty-six thousand, seven hundred and fifty pounds sterling. This sum being divided by the value of the avoirdupois pound of gold, gives a quotient of more than six hundred and thirty to one.

It is one of the valuable properties of iron, after it is reduced into the state of steel, that, although it is sufficiently soft when hot, or when gradually cooled, to be formed without difficulty into various tools and utensils, still it may be afterward rendered more or less hard, even to an extreme degree, by simply plunging it, when red-hot, into cold water. This is calledtempering, the hardness produced being greater in proportion as the steel is hotter and the water cooler. Hence arises the superiority of this metal for making mechanics’ instruments or tools, by which all other metals, and even itself, are filed, drilled and cut. The various degrees of hardness given to iron, depend on the quantity of ignition it possesses at the moment of being tempered, which is manifested by the succession of color exhibited on the surface of the metal, in the progress of its receiving the increasing heat. These are, the yellowish white, yellow, gold-color, purple, violet, and deep blue; after the exhibition of which the complete ignition takes place. These colors proceed from a kind of scorification on the surface of the heated metal.

The largest iron-works in England are carried on inColebrookdaleColebrookdale, in Shropshire. This spot, which is situated between two towering and variegated hills, covered with wood, possesses peculiar advantages, the ore being obtained from the adjacent hills, the coals from the vale, and abundance of limestone from the quarries in the vicinity. The romantic scenery which nature here exhibits, and the works which are carried on, seem to realize the ancient fable of the Cyclops. The noise of the forges, mills, &c., with all their vast machinery, the flames bursting from the furnaces, with the burning coal, and the smoke of the lime-kilns, are altogether horribly sublime. To complete the peculiarities of the spot, a bridge, entirely constructed of iron, is here thrown over the Severn. In one place it has parted, and a chasm is formed; but such is its firm basis, that the fissure has neither injured its strength nor utility.

The great superiority of Swedish iron over that of all other countries, for the manufacture of steel, is well known, and is ascribed to the great purity of the ore from which the iron is smelted. The British steel-makers have found it difficult to employ British iron in their processes, it being too brittle to bear cementation; but attempts have been made at Sheffield, with some success. Wootz, a species of steel from India, has been successfully used for nicer kinds of cutlery. One of the most remarkable of the Swedish mines, if the name can with propriety be applied to it, is Tabern, a mountain of a considerable size, composed entirely of pure iron ore, and occurring in a large tract of sand, over which it seems to have been deposited. This mountain has been wrought for nearly three centuries, notwithstanding which its size is scarcely diminished.

But the richest iron mine of Sweden is that of Danmora, in the province of Upland. It is in depth eighty fathoms; occupies a considerable extent of territory; and its ore is conveyed to the surface of the earth, through several pits or openings made for that purpose, by means of casks fixed tolarge cables, which are put in motion by horses. The workmen standing on the edges of these casks, and having their arms clasped round the cable, descend and ascend with the utmost composure. The water is drawn from the bottom by a wheel sixty-six feet in diameter, and is afterward conveyed along an aqueduct nearly a mile and a half in length. At certain distances from Danmora, are several furnaces, with large and populous villages exclusively inhabited by the miners.

In Wraxall’s tour through the north of Europe, the mine of Danmora is described as yielding the finest iron ore in Europe, its produce being exported to every country, and constituting one of the most important sources of national wealth and royal revenue. The ore is not dug, as is usual in other mines, but is torn up by the force of gunpowder, an operation which is performed every day at noon, and is one of the most awful and tremendous that can possibly be conceived. “We arrived,” observes the tourist, “at the mouth of the great mine, which is nearly half an English mile in circumference, in time to be present at it. Soon after twelve the first explosion took place, and could not be so aptly compared to anything as to subterraneous thunder, or rather volleys of artillery discharged under ground. The stones were thrown up, by the violence of the gunpowder, to a vast hight above the surface of the ground, and the concussion was so great as to shake the surrounding earth or rock on every side.

“As soon as the explosion had ceased, I determined to descend into the mine, to effect which I had to seat myself in a large, deep bucket, capable of containing three persons, and fastened by chains to a rope. When I found myself thus suspended between heaven and earth by a rope, and looked down into the dark and deep abyss beneath me, to which I could see no termination, I shuddered with apprehension, and half repented my curiosity. This was, however, only a momentary sensation, and before I had descended a hundred feet, I looked round on the scene with very tolerable composure. It was nearly nine minutes before I reached the bottom; and when I set my foot on the earth, the view of the mine was awful and sublime in the highest degree. Whether, as I surveyed it, terror or pleasure formed the predominant feeling, is hard to say. The light of the day was very faintly admitted into these subterraneous caverns: in many places it was absolutely lost, and flambeaux were kindled in its stead. Beams of wood were laid across some parts, from one side of the rock to the other; and on these the miners sat, employed in boring holes for the admission of gunpowder, with the most perfect unconcern, although the least dizziness, or even a failure in preserving their equilibrium, must have made them lose their seat, and have dashed them against the rugged surface of the rock beneath. The fragments tornup by the explosion, previously to my descent, lay in vast heaps on all sides, and the whole scene was calculated to inspire a gloomy admiration.

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