Port-fire.SeeLaboratory Stores.
Portfolio.A portable case for keeping loose papers in. Hence, also, the office and functions of a minister of state or member of the cabinet; as, to receive the portfolio of war.
Portglave.An ancient name for a sword-bearer.
Portland Isle.An island off the coast of Dorset, England, which was fortified before 1142.
Porto(orPuerto)Bello. A seaport town of South America, on the north coast of the Isthmus of Darien.
Porto Novo.A seaport of British India, in the Presidency of Madras, at the mouth of the Vellaur. It suffered severely in the wars of the British government against Mysore, and fell into a state of decay. At Porto Novo, Hyder Ali, with an immensely superior army, was totally defeated by the British under Sir Eyre Coote in 1791.
Porto Rico.A Spanish possession, one of the group of West India Islands called the Great Antilles. Porto Rico was invaded in 1509 by Spaniards from Hayti, and the natives were soon exterminated by them. Towards the end of the 17th century the island was captured by the British, but was abandoned by them soon afterwards. In 1820 a revolution took place in Porto Rico, which was finally put down in 1823.
Portugal(anc.Lusitania). A kingdom in the southwest of Europe, forming the western part of the Spanish peninsula. After nine years’ struggle, under Viriathes, a brave and able leader, the Lusitanians submitted to the Roman arms about 137B.C.In the 5th century the Suevi, Vandals, and Visigoths became possessors of the country. In the beginning of the 8th century Portugal shared the fate of Spain, and was overrun by the Moors. After a long struggle, during which many battles were fought, and many illustrious deeds achieved, the Portuguese monarchy was formally established by the Cortes at Lamego in 1143, with Alfonso I. (of the Burgundian house) as king. The immediate successors of Alfonso I. were engaged in many severe struggles with the clergy, who were always ready to combine against the sovereign; but on the whole, the dignity of the kingdom was well maintained by the representatives of this family, who are, moreover, distinguished as the promoters and upholders of the maritime glory of Portugal. Alfonso, surnamed “the Brave,” ascended the throne in 1325, and his reign was almost wholly occupied in wars with the Castilians and the Moslems. With his grandson, Ferdinand I., the legitimate branch of the Burgundian house became extinct in 1383. During the reign of John II., the Azores, Madeira, Cape de Verde, and other islands were seized. The discovery of Brazil and the settlements made there and on the western coast of India increased the maritime power and fame of Portugal, which were further extended under John III., who ascended the throne in 1521, and during whose reign the Inquisition was introduced. At this period Portugal ranked as one of the most powerful monarchies in Europe. Sebastian (grandson of John III.), urged by the Jesuits, entered upon a fatal expedition to Africa against the infidels. The defeat of the Portuguese, and the capture and death of their young king at the battle of Alcazar in 1578, and the extinction of the old Burgundian line in 1580, plunged the country into difficulties and misfortunes of every kind. Philip II. of Spain succeeded in securing to himself the crown of Portugal, and annexing the Portuguese kingdom to the Spanish monarchy. This event proved disastrous in the extreme to Portugal, involving it in all the ruinous wars of Spain in the Low Countries and in Germany, the greater part of the expenses of which it bore; while the Dutch, in retaliation for Spanish aggression at home, attacked the Portuguese settlements in Brazil, and almost completely deprived them of their possessions in the Indian Archipelago. In 1640, after a forced union of 160 years, Portugal was freed, by a bold and successful conspiracy of the nobles, from all connection with Spain, and the Duke de Braganza placed on the throne, under the title of John IV. The war with Spain, which was the natural result of this act, terminated in 1668, when by the treaty of Lisbon, the independence of Portugal was formally recognized by the Spanish government. For the next hundred years, Portugal vegetated in a state of inglorious apathy. It was invaded by the French in 1807,—a measure which gave rise to the Peninsular war. The victory of Vimeira, gained by the combined English and Portuguese army in 1808, freed the land from its French assailants. A revolution broke out in Lisbon in 1820. In 1832, Dom Pedro raised a fleet and made a landing at Oporto. Admiral Napier in the mean while operated on the coast of Algarve successfully in favor of the young queen Doña Maria de Gloria, whose cause, by these victories and the support of an alliance with the great powers, finally proved victorious. Doña Maria made her entry into Lisbon in 1833; and in the following year Dom Miguel (who had disputed the throne) signed the convention of Evora, by which he renounced all pretensions to the throne. During the reign of Doña Maria insurrections and counter-insurrections were of frequent occurrence, the troops were not to be depended on in moments of emergency; guerrilla bands scoured the country at will, and openly defied the queen’s authority. An armed intervention of the great powers in 1847 produced a partial abatement of the national disorders; but the queen’s partiality for her unpopular ministers, Count Thomar and his brother Cabral, led to the insurrection which, without bloodshed, made the national idol, the Marquis de Saldanha,de factomilitary dictator of Portugal. The eldest son of the queen ascended the throne in 1853, as PedroV., under the regency of the king-consort his father. The latter used his power discreetly, and the financial disorders were partially adjusted, and since that period the general condition of the nation is more promising.
Positions, Military.The sites occupied by armies, either for the purpose of covering and defending certain tracts of country, or preparatory to the commencement of offensive operations against an enemy. A position is considered as advantageously chosen when it is on elevated ground; when it is not commanded by eminences within the range of artillery; and when, from the existence of natural obstacles, as rivers or marshes, on the wings, it is incapable of being turned,—that is, the enemy cannot, without making an extensive movement, get to the rear of the army by which the position is occupied. In the event of such points of support being wanting, the position, whether it be a plain or an eminence, should have its flanks protected by villages, or by redoubts raised for the purpose. A village, or even a single building, on the ground occupied by the army, may become the key of the position; and as, not unfrequently, on the preservation of this point depends the field of battle, such point should be well supported by troops and artillery. The highest point of ground, particularly if near the lines of operation, may also constitute the key, and is usually strengthened by one or more redoubts. Artillery should always be placed where it can act with the most effect; and when the ground occupied by an army presents alternately salient and retired points along the front of the line, the batteries should be placed at such points. Infantry may occupy any kind of ground, but should, if possible, always form a close line. It is usually placed between the batteries; and if exposed to a distant cannonade, the troops may be drawn up in a trench, the earth from which will serve to cover them without preventing them from marching out in line to meet the enemy. Cavalry must be posted on a level plain, over which it may advance with regularity when a charge is to be made; if compelled to act on broken ground, it is formed in small detachments behind the infantry, through whose intervals it may pass at proper opportunities. The power of readily appreciating the character of ground for military purposes is what is called by foreign writers the militarycoup d’œil; and this can only be acquired by a profound knowledge of military tactics of war, joined to much experience in the practice of executing military surveys, and of contemplating the appearance of ground from all possible points of view.
Posse Comitatus.A sheriff or marshal, for the purpose of keeping the peace and pursuing felons, may command all the people of his county above fifteen years old to attend him, which is called theposse comitatus, or “power of the county.”—Blackstone.
Possession.To take possession, is the act of occupying any post, camp, fortress, etc., which might facilitate the operations of an army, or which previously belonged to the enemy.
Post.Any sort of ground, fortified or not, where a body of men can be in a condition of resisting the enemy.
Advance post, a spot of ground seized by a party to secure their front, and the post behind them.
Postis also the walk or position of a sentinel.
Post.In the British service, a bugle-sound. The first post is the bugling which precedes the tattoo; the last post that which follows it. Also, the piece of ground to which a sentinel’s walk is limited; any place or office assigned to a soldier or body of soldiers on duty.
Post, Abandoning a.SeeAppendix,Articles of War,42.
Post, Advantageous.Every situation is so called which an enemy occupies in such a manner that not only mere force of arms, but great military skill, and many stratagems, are required to dislodge him.
Post of Honor.The advanced guard is a post of honor; the right of the two lines is the post of honor, and is generally given to the eldest corps; the left is the next post, and given to the next eldest, and so on. But the laws of military discipline forbid an inconvenient accordance with this practice, as the circumstances of the case may require a very different arrangement, which it would be wanton to oppose.
Post, Sleeping Upon.SeeAppendix,Articles of War,39.
Post, To.In a military sense, means to station; as, to post a sentinel.To be posted, in military tactics signifies to be formed ready for action. Thus, when troops are brought up in column, and ordered to deploy, it frequently happens that some part of the line is refused, in order to flank an enemy, or to cover a weak position; the part that is aligned is said to be posted. To be posted also means, in a familiar sense, to be publicly announced as an infamous or degraded character. Hence, to post a man as a coward is to stick his name up in a conspicuous place, and to accuse him of want of spirit, etc.
Postern, orSally-port. Is a passage usually vaulted, and constructed under the rampart, to afford a communication from the interior into the ditch. The passages from the covered way into the country are likewise called sally-ports, as they afford free egress and ingress to troops engaged in making a sally or sortie.
Post-traders.Traders are allowed in the American army at the rate of one to each military camp or post, who have the exclusive privilege to trade upon the military reserve to which they are appointed, and noother person will be allowed to trade or sell goods by sample or otherwise, within the limits of the reserve, except producers of fresh fruit and vegetables, by permission of the post commander. Post-traders are selected for the appointment by a council of administration, consisting of the three senior officers, next to the commanding officer, on duty at the post, and upon the recommendation of these officers, approved by the post commander, are appointed by the Secretary of War. The trader is authorized to keep on hand for sales to the troops, articles of wholesome food, such clothing as soldiers may be permitted to purchase, tobacco, blacking, etc., the prices to be regulated by the council of administration. At remote military posts in the United States, traders are authorized to keep on hand the necessary supplies for sales to miners, settlers, and emigrants. SeeCanteen, andSutler.
Pot.The paper cylinder forming the head of a signal-rocket and containing the decorations. To diminish the resistance of the air the pot is surmounted by a paper cone.
Pot, Stink-.SeeStink-pot.
Potence(Fr.). Troops are rangeden potenceby breaking a straight line, and throwing a certain proportion of it, either forward or backward, from the right or left, according to circumstances, for the purpose of securing that line. An army may be posteden potenceby means of a village, a river, or a wood.
Potent Counter-potent.In heraldry, one of the heraldic furs, in which the field is filled with crutch-shaped figures alternately of metal and color, those of opposite tinctures being placed base against base, and point against point. The metal and colors are understood to be argent and azure, unless they be specifically blazoned otherwise. Potent counter-potent is sometimes blazoned Vairycuppy.
Potent, Cross.In heraldry, a cross crutch-shaped at each extremity. It is also called a Jerusalem cross, from its occurrence in the insignia of the Christian kingdom of Jerusalem, which are, argent a cross potent between four crosslets or. This coat is remarkable as being a departure from the usual heraldic rule which prohibits the placing of metal upon metal.
Potentee.A heraldic line of division which takes the form of the outline of a succession of crutch-shaped figures.
Potgun.Formerly a short, wide cannon, formed like a pot.
Potidæa.A town in Macedonia, on the narrow isthmus of the peninsula Pallene, was a strongly fortified place, and one of considerable importance. It was a colony of the Corinthians, and was founded before the Persian wars. It afterwards became tributary to Athens, and its revolt from the latter city in 432B.C.was one of the immediate causes of the Peloponnesian war. It was taken by the Athenians in 429, after a siege of more than two years, its inhabitants expelled, and their place supplied by Athenian colonists. In 356 it was taken by Philip of Macedon, who destroyed the city, and sold the inhabitants into slavery. Cassander, however, built a new city on the same site, to which he gave the name ofCassandria, and which he peopled with the remains of the old population, and the inhabitants of the surrounding towns. It was taken and plundered by the Huns, but was restored by Justinian.
Potomac.A river of the United States, formed by two branches, which rise in the Alleghany Mountains, and unite 20 miles southeast of Cumberland, Md., from which point the river flows in a generally southeasterly course, 400 miles, and falls into Chesapeake Bay, where it is 6 to 8 miles broad, 75 miles from the ocean. Line-of-battle ships ascend to Washington, 120 miles from its mouth. The Potomac forms the greater part of the boundary between Virginia and Maryland. During the civil war, both Federal and Confederate armies crossed several times the fords of the Upper Potomac, and severe actions were fought upon its banks. The largest army of the Union was named after it.
Pottawatomies.A tribe of Indians of Algonkin stock, who formerly occupied a great part of Michigan, where a few still remain. They fought against the settlers in the Pontiac war, and against the Americans in the war of the Revolution; and were allies of the British in the war of 1812, soon after which they removed to Kansas, where they now reside in a partial state of civilization, only about 500 of what is known as the Prairie band being located on a reservation.
Pouch.A case of strong leather, lined with tin divisions, for the purpose of carrying a soldier’s ammunition. It is covered by a flap to preserve the cartridges from wet. The leather cases containing primers, lanyard, etc., in field and heavy artillery, and those containing a gunner’s level, vent-punch, gimlet, etc., in heavy artillery, are also called pouches.
Pounder.The term used in describing the force of a cannon employed in firing solid shot; as, a 9-pounder field-gun, a 300-pounder Armstrong, etc.
Powder.SeeGunpowder.
Powder-cart.A two-wheeled carriage covered with an angular roof of boards. To prevent the powder from getting damp, a tarred canvas is put over the roof; and on each side are lockers to hold shot, in proportion to the quantity of powder.
Powdered, orSemée. In heraldry, strewn with an indefinite number of small charges.
Powder-magazine.SeeMagazine.
Powder-measure.SeeImplements.
Powder-mill.SeeMill, Gunpowder-.
Power.In military affairs as well as in all others, is knowledge—of human passions—of arms—of distance—of the skill andnumbers of an enemy. To be in thepowerof an enemy, is to have taken up, injudiciously, such a position as to expose you to a defeat whenever the enemy may think proper to attack you.
Powerful.Full of power; capable of producing great effects of any kind; as, a powerful army or navy.
Powldron.In heraldry, that part of armor which covers the shoulders.
Powwow.A priest or conjurer among the North American Indians. Also conjurations performed for the cure of diseases and other purposes, attended with great noise and confusion, and often with dancing.
Poynado.A poniard was formerly so called.
Pozzuoli.A city of Southern Italy, at the east of the Bay of Naples. It is first mentioned in history during the second Punic war, when it was surrounded by strong walls. In 214B.C.it repulsed Hannibal, and subsequently became a place of importance. It was destroyed by Alaric, Genseric, and Totila. It was afterwards rebuilt by the Byzantine Greeks, but being exposed to new devastations, to earthquakes, and volcanic eruptions, it sank into decay.
Practicable.A word frequently used in military matters to express the possible accomplishment of any object. Hence, a practicable breach.
Practice, To.In a military sense, to go through the manual and platoon exercises, or through the various manœuvres, etc., for the purpose of becoming thoroughly master of military movements. Practice is likewise used to signify the act of effecting or executing any military operation.
Præliares.Among the Romans, fighting days, on which they thought it lawful to engage in acts of hostility; for during the time of some particular feasts, they reckoned it a piece of impiety to raise, march, or exercise men for war, or to encounter the enemy, unless first attacked.
Prætorians.Was, during the Roman republic, a select cohort that attended the prætor or commander of an army. They frequently decided the fate of battles. After the overthrow of the republic, Augustus formed them into nine cohorts, and fixed their station in the capital as body-guards. They became, in short, under the emperors, what “the guards” are to the monarchies of Europe. They, in addition to their military duties, frequently had the charge of state prisoners, and often acted the part of executioners. They were all picked men, chosen for the most part from Italy. Their power increased greatly under the empire until they frequently determined the fate of an emperor. Diocletian reduced their number, and Constantine disbanded them.
Prætorium.SeePretorium.
Praga.A town of Poland, on the Vistula, opposite to Warsaw, with which it communicates by a bridge of boats. In 1794 the Polish insurgents took refuge here, and it was stormed by Suwarrow, and given up to pillage and massacre, when about 20,000 were slain. In 1830 the Grand Duke Constantine of Russia was forced to retreat from this town with his troops, at the beginning of the Polish revolution in that year, which unfortunately proved unsuccessful.
Prague.A city of Austria, the capital of Bohemia, situated on the Moldau. Prague was conquered and almost destroyed by the Hussites in 1424; but after the subsequent defeat and submission of the Hussites, the city was rebuilt. In the Thirty Years’ War it suffered severely, and in 1620 the battle was fought at the White Mountain, near the city, in which Frederick V. (the “Winter King”), son-in-law of James I. of England, was completely defeated, and compelled to renounce his assumed crown, and to give up the town into the power of the emperor of Austria. Swedes and Imperialists successively gained possession of it during the war; and a century later, during the Seven Years’ War, it again fell into the hands of different victors, being compelled, in 1744, to capitulate to Frederick the Great of Prussia; but he was obliged to abandon it the same year. In 1757 the king of Prussia again besieged it, but his efforts to reduce it proved ineffectual. In 1848 it was bombarded, the inhabitants having risen against the Austrian government, when great cruelties were perpetrated by the Austrian troops. A treaty of peace between Austria and Prussia was signed at Prague, August 23, 1866.
Praguerie, War of(so named from Prague, then celebrated for its civil disorders). Was the name given to the revolt of the dauphin, afterwards Louis XI., against his father, Charles VII., aided by Alexander, the bastard, of Bourbon, and other nobles. It was soon quelled; Louis was exiled, and Alexander put to death by drowning, July, 1440.
Prairie Raft.SeePontons.
Prairie-carriage.SeeOrdnance, Carriages for.
Prance.To spring or bound, as a horse in high mettle. To walk or strut about in a showy manner, or with warlike parade.
Precedence.Priority in rank or precedence in military life, is regulated by the date of an officer’s commission, or the standing in the corps to which he may belong.
Precedent.Any act which can be interpreted into an example for future times, is called a precedent. Persons in high office are extremely scrupulous with respect to precedents, especially in military matters.
Precision.Exact limitation, scrupulous observance of certain given rules.
Predal, orPredatory War. A war carried on by plunder and rapine.
Prefect(Lat.præfectus). A Roman officer who was over, or who superintended, a particular command, charge, department, and the like. Of this class there were several, as the prefect of a camp, of a fleet, of the city guards, etc.
Prefect Pretorian.In Roman antiquity, was the commander of the pretorian guards.
Preferment.The state of being advanced to a higher post.
Prejudice.An opinion or decision of mind formed without due examination; prejudgment; a bias or leaning toward one side or the other of a question from other considerations than those belonging to it; an unreasonable predilection or prepossession for or against anything; especially, an opinion or leaning adverse to anything formed without proper grounds, or before suitable knowledge.
Prejudicial to Military Discipline, Conduct.SeeAppendix,Articles of War,62.
Prenzlow.A town of Prussia, in the province of Brandenburg, 71 miles north-northeast from Berlin. Here, in October, 1806, a body of Prussians, 10,000 strong, under the Prince of Hohenlohe, surrendered, after the defeat of Jena, to the French under Murat.
Prepare for Action.A word of command used in the artillery.
Preponderance.In gunnery, is the excess of weight of the part in rear of the trunnions over that in front; it is measured by the lifting force in pounds, which must be applied at the rear of the base-ring, at the base-line, or at the bottom of the ratchet, to balance the piece when suspended freely on the axis of the trunnions. Preponderance was given to prevent the sudden dipping of the muzzle, in firing, and violent concussion on the carriage at the breech. Most of the heavy pieces of the late models have no preponderance, the axis of the trunnions intersecting the axis of the piece, at the centre of gravity.
Presburg.A town of Hungary, situated on the Danube, 36 miles east from Vienna. This town was once the capital of Hungary, and the emperors of Austria are still crowned here as kings of Hungary. It is noted for the treaty concluded there between France and Austria in 1805, when the Tyrol was given to Bavaria, and Venice to the French.
Prescott(Upper Canada). On November 17, 1838, the Canadian rebels were attacked by the British under Maj. Young, and (on the 18th) by Lieut.-Col. Dundas, who dispersed the insurgents, several of whom were killed, and many taken prisoners, the remainder surrendering. The troops also suffered considerably.
Presence of Mind.Ready conceptions of expedient, producing promptitude of action under difficult and alarming circumstances. A quality indispensable in a general.
Present.In the British service, means to level; to aim; to bring the musket to a horizontal position, the butt resting against the right shoulder for the purpose of discharging its contents at a given object.
Present.To offer openly; to exhibit; to give in ceremony; as, to present the colors.
Present Arms, To.In tactics is to bring the musket to a certain prescribed position, for the purpose of paying a military compliment.
Preservation of Cannon and Ammunition.SeeLacker.
President.The President of the United States is commander-in-chief of the army, navy, and militia, called into service. His functions as such are assigned by Congress, but embrace of course whatever authority may be assigned to any military commander, on the principle that the authority of the greater includes that of the less. For the command, government, and regulation of the army, however, Congress has created a military hierarchy or range of subordination in the army with rights and duties regulated by Congress, and the commander-in-chief cannot make use of any other agents in exercising his command; and all orders issued by him must be according to the rules and articles made by Congress for the government of the army. In his capacity of chief magistrate of the Union, Congress has also invested the President with many administrative functions relating to military affairs; and for the performance of the latter duties the secretary of the department of war has been made his minister, upon matters connected withmatériel, accounts, returns, the support of troops, and the raising of troops.
President.The president of a court-martial is the senior member. He preserves order in court; administers the oath taken by the judge-advocate, and the proceedings of the court are authenticated by his signature and that of the judge-advocate.
Presidio(Sp.). A place of defense; a garrison or guard-house.
Pressure-gauge.Called alsopressure-plug. An apparatus invented by Gen. Rodman for measuring the pressure exerted by the gases of exploded powder. It consists essentially of a steel plunger, on the head of which the pressure is exerted. The other end of the plunger is widened out into two cutting edges which meet at an obtuse angle. This point rests on a disk of copper, into which the cutter is driven by the pressure. The pressure is deduced from the length of the cut. Two forms of the instrument are used,—one is placed in a hole bored through the side of the gun. The other is complete in itself and is placed at the bottom of the cartridge-bag. Lieut. Metcalfe’s (U. S. Ordnance Corps) modification of the pressure-gauge has a cutter with a helicoidal edge. To measure the cut he uses a circular scale with a hole in the centre (in which the inducted copper is placed), and a radial arm to show the extent of the spiral cut. The English modification of Rodman’s instrument is called thecrusher-gauge,—a short cylinder of copper is substituted for the disk,—the reduction in its length gives a measure of the pressure. The crusher-gauge is frequently attached to the base of the shot. A similar modification is used to test the powerof the high explosives, such as dynamite, dualin, etc. A lead cylinder is crushed in this case. A very small charge is used. The reaction is obtained by placing a heavy cylindrical shot over the charge, which rests directly in a cavity on the top of the plunger.
Preston.A town of England, in Lancashire, on the north bank of the Ribble. This town was partially destroyed by Bruce in 1322; and after declaring for the king, it was taken by the forces of the Parliament under Gen. Fairfax. Here also ended the ill-fated Jacobite rising of 1715, when, after a brave resistance, the insurgents were compelled to surrender.
Prestonpans.A village of Haddingtonshire, 8 miles east of Edinburgh. In the vicinity, on September 21, 1745, was fought the famous battle of Prestonpans, between the royal troops under Sir John Cope and the Jacobites under Prince Charles, in which the latter, with a loss of only about 10 officers and 120 men in killed and wounded, routed the royal forces with great slaughter, and captured their cannon, baggage, and military chest.
Pretence, Escutcheon of, orEscutcheon Surtout. In heraldry, a small shield placed in the centre of the field of another shield. The husband of an heiress may bear the arms of his wife in an escutcheon of pretence, instead of impaling them. Feudal arms are also sometimes placed on an escutcheon of pretence, particularly in the insignia of elective sovereigns, who have been in use of bearing their own proper arms in surtout over those of the dominions to which they are entitled.
Pretorian.Appertaining to pretor; also the general’s guard among the ancient Romans.
Pretorium.The hall or court where the pretor lived and administered justice. It also denoted the tent of the Roman general, in which councils of war were held. The place where the pretorian guards were quartered or lodged, was likewise called pretorium.
Prevesa.A fortified town of European Turkey, in Albania, on the north shore of the Gulf of Arta, 58 miles south-southwest of Yanina. Prevesa belonged to the Venetians from 1684 until the fall of that republic in 1797. It was then held by the French for a time, but was afterwards taken by the Turks.
Prey.Anything, as goods, etc., taken by force from an enemy in war; spoil; booty; plunder.
Pricker.A light horseman was formerly so called.
Pricker.Apriming-wire(which see).
Pride.In heraldry, a peacock or other bird, when the tail is spread out in a circular form, and the wings drooped, is said to be “in his pride.”
Priest-cap.In fortification, a work so named from its shape; called alsoswallow-tail. SeeRedan.
Prime.To charge with the powder, percussion-cap, or other device for communicating fire to the charge, as a fire-arm.
Primer.A wafer, cap, tube, or other device for communicating fire to the charge of powder in a cannon. The cap or tube usually contains a friction- or percussion-powder. Thefriction-primeris generally used in the land service. (SeeFriction-primer.) For service on shipboard, a quill filled with rifle-powder, having on the top a capsule of fulminate of mercury, is generally employed. The capsule is exploded by a blow from the lock-hammer. Thetape-primer, used sometimes in blasting, is formed of long, flexible strips of paper or fabric containing fulminate or other quick-burning substance. Theelectric primeris used to fire simultaneous discharges, both in ordnance and blasting. In firing wet gun-cotton, the small charge of dry gun-cotton used in conjunction with thedetonating exploderis called aprimer. Insmall-armsthe term is specially applied, at the present time, to the percussion-caps used in reloading metallic cartridge-cases. The cap is set in a recess in the head of the shell. When the firing-pin strikes the outside end of the cap, the fulminate is exploded by being driven against a perforated cone called theanvil. Thisanvilis usually a part of the shell. In theWinchester primer, recently invented, the anvil is a part of the primer itself, being inserted upon the fulminate. A shoulder in the recess holds the anvil when the cap is struck.
Priming.The powder, percussion-cap, or other device used to communicate fire to the charge in a fire-arm.
Priming-tubes.SeeLaboratory Stores.
Priming-wire.A pointed wire, used to penetrate the vent of a piece, for examining the powder of the charge, or for piercing the cartridge.
Primipilarii,Primopilarii, orPrimipilares. Among the Romans, were such as had formerly borne the office of primipulus of a legion. The banner was intrusted to his care. Among other privileges which the primipilarii enjoyed, they became heirs to what little property was left by the soldiers who died in the campaign.
Primipilus.The centurion belonging to the first cohort of a legion. He had charge of the Roman eagle.
Princeton.A town of Mercer Co., N. J., about 40 miles northeast of Philadelphia. This place was the scene of an important engagement during the Revolutionary struggle, although the numbers engaged were comparatively small. On hearing of the English reverse atTrenton(which see), Gen. Howe immediately ordered Cornwallis, who was in New York, to proceed with his forces to Princeton. Leaving a part of his troops at this place, he proceeded towards Trenton with the intention of giving battle to the Americans, and arrived with his vanguard on January 1, 1777. Washington, learning that only three regiments were left atPrinceton, by a circuitous night march arrived there by daybreak of January 3, surprised and completely routed the enemy with a loss of 200 killed and wounded, and as many prisoners. The American loss did not exceed 30. This event greatly aroused the drooping spirits of the colonists, who had been previously disheartened by a series of reverses.
Principes.In the Roman armies, were the infantry, who formed the second line in the order of battle. They were armed like thehastati, with this difference, that the former had half-pikes instead of whole ones.
Principles, Military.The basis or ground-work upon which every military movement is made, and by which every operation is conducted.
Prismatic Compass.A surveying instrument, much used on account of its convenient size and form in military sketching, and for filling up the details of a map where great accuracy is not required.
Prismatic Powder.SeeGunpowder.
Prisoners.Are persons under arrest or in custody, whether in prison or not. Whenever any officer is charged with a crime, he is to be arrested and deprived of his sword by the commanding officer; and soldiers charged with crimes are to be confined until tried by a court-martial, or released by proper authority. (SeeAppendix,Articles of War,65and66.) When brought into court, a prisoner should be without irons, or any manner of shackles or bands, unless there is danger of an escape, and then he may be secured with irons.—Blackstone.
Prisoners of War.Are soldiers captured during an engagement, siege, or continuance of hostilities, who are deprived of their liberty until regularly exchanged.
Prisons, Military.Are buildings constructed for the retention of prisoners of war, or for the safe-keeping and punishment of offenders against military law. Sometimes during war forts and other strong buildings are utilized for these purposes. The following were noted prisons during the civil war, 1861-65, for the retention of Federal prisoners of war:
Andersonville(which see).
Belle Isle.—An island in the James River near the city of Richmond, Va. The unfortunate prisoners taken were placed on this island without shelter of any kind to protect them from the scorching rays of the sun during the day or the chilly cold mists of the night, until death or exchange released them from their sufferings.
Castle Thunder.—A fort in Charleston harbor, S. C., which was used for the same purpose.
Libby.—An old tobacco warehouse in Richmond, Va., which was temporarily converted into a military prison; and for cruelty and torture to the Union prisoners this place was second only to Andersonville.
Salisbury.—A town in North Carolina, which had another depot for prisoners.
There were also prisons established for the retention of Confederate prisoners at Camp Douglas, Chicago, Camp Chase, Ohio, Elmira, N. Y., Point Lookout, Md., and Rock Island, Ill.
AtFort Leavenworth, Kansas, a permanent military prison was established in accordance with an act of Congress passed March 3, 1873, in which soldiers of the U. S. army are confined for serious offenses against military law.
AtDartmoor, a desolate region in England, a prison was constructed in 1809 for the confinement of French prisoners of war which deserves a passing notice, inasmuch as Americans were confined there during the war of 1812. It comprised 30 acres, inclosed with double walls, with seven distinct prison-houses with inclosures. In 1812 there were 6000 American prisoners of war within its walls who were treated with much cruelty, and, in consequence of the appearance of mutinous intentions of some of the prisoners on account of the tardiness of the English officials in releasing them after the treaty of peace was ratified, they were fired upon by the English soldiers, which resulted in the killing of 5 and wounding of 33 prisoners. This act was regarded in America as a wanton massacre.
Privas.A town of France, capital of the department of Ardèche, 26 miles southwest from Valence. In the civil wars of the 16th and 17th centuries in France, Privas, which was then a strongly-fortified town, played a conspicuous part, being always favorable to the Protestant party. In 1629 it was bravely defended by a small garrison under St. André de Montbrun against Louis XIII., but after a siege of two months had to be abandoned. Montbrun being soon afterwards taken was hanged, and the fortifications of Privas were leveled to the ground.
Private.The title applied in the British army to a common soldier of the cavalry and infantry; the corresponding rank in the artillery being gunner or driver, and in the engineers, the sapper. A private in the cavalry is sometimes called a trooper. In the U. S. army all the soldiers who are below the grade of non-commissioned officers are called privates.
Privy-coat.A light coat or defense of mail, concealed under the ordinary dress.
Prize.That which is taken from another; a thing seized by force, stratagem, or superior power. Hence, specifically, anything captured by a belligerent using the right of war.
Prize.The application of a lever to move any weighty body, as a cask, cannon, or the like.
Prize Agent.In the British service, a person appointed for the distribution of such shares of money as may become due to officers and soldiers after battle, siege, or capture.
Prize-bolt.A manœuvring-bolt of a mortar-bed.
Prize-money.The proportion which ispaid to the troops who are present at the capture or surrender of a place, etc., which yields booty.
Prizing.The same asprize, which see.
Proclamation.The act of publishing abroad; conspicuous announcements; official or general notice; publication; that which is put forth by way of public notice; an official public announcement or declaration; a published ordinance; as, the proclamation of a king. A proclamation may be issued to declare the intention of the head of a government to exercise some prerogative or enforce some law which has for a long time been dormant or suspended. In time of war, the head of the government by a proclamation may lay an embargo on shipping, and order the ports to be shut. But the most usual class of proclamations are admonitory notices for the prevention of offenses, consisting of formal declarations of existing laws and penalties, and of the intention to enforce them. Proclamations are only binding when they do not contradict existing laws, or tend to establish new ones, but only enforce the execution of those which are already in being, in such manner as the head of the government judges necessary.
Proconsul.In Roman antiquity, an officer who discharged the duties of a consul without being himself consul; a governor of a province, or a military commander under a governor. He was usually one who had previously been consul, and his power was nearly equal to that of a regular consul.
Prodd.A cross-bow, used for throwing bullets in ancient times.
Profile.A section of a parapet or other work in fortification.
Projectile.A body projected or impelled forward by force, especially through the air. In a limited military sense the term is applied to a body intended to be projected from a cannon by the force of gunpowder, or other explosive agent, to reach, strike, pass through, or destroy a distant object. The materials of which projectiles are usually composed are lead, wrought or cast iron, each possessing advantages according to the circumstances under which they are fired. But the material which combines in a greater degree than any other the essential qualities of hardness, strength, density, and cheapness, is cast iron, which is exclusively used in the U. S. service for large projectiles. Compound projectiles are sometimes made, so as to combine the good and correct the bad qualities of different metals. To obviate the serious results that may arise from the wedging of the flanges of a cast-iron projectile in the grooves of a rifle-cannon, it is frequently covered with a coating of lead or other soft metal. Cast and wrought iron have also been combined with success, and also cast iron and soft metal in such a manner as to attain the strength of one metal and the softness and expansibility of the other. Other metals, such as brass, are also used in projectiles of special construction. Projectiles are generally classified, according to their form, into spherical, or smooth-bore, and oblong, or rifle projectiles.
Spherical Projectilesare fired mainly from smooth-bore guns. They are solid shot, shells, spherical case or shrapnel, grape, canister, carcasses, grenades, light- and fire-balls. The advantages which they possess over the oblong are their uniformity of resistance to the air, presenting the least extent of surface for a given weight, the coincidence of their centres of form and inertia; they are less liable to wedge in the bore, as they touch the surface at only one point; and they are best adapted for rolling and ricochet fire on account of the regularity of their rebounds. Solid shot are usually made of cast iron, and are designated by the diameter of the bore of the piece in which they are to be used, or by their weight. Shells are cast with a core of sand (greater or less according to the thickness required), which is afterwards removed. The mortar-shell has the thinnest walls, and contains the greatest bursting charge for the same caliber; the gun-shell is thicker, and the battering-shell is nearly as strong as the solid shot. Shells are usually designated by the weight of the solid shot of the same diameter.
Oblong Projectilesare fired principally from rifled pieces, and have been adopted on account of the increase of range and accuracy which can be obtained with them. For this purpose it is necessary that the projectile should move through the air in the direction of its length. Though experience would seem to show that the only sure method of effecting this is to give it a rapid rotary motion round its axis by the grooves of the rifle, numerous trials have been and are now being made to produce the same effect with smooth-bored guns. One of the simplest plans for this purpose is to place the centre of gravity or inertia in advance of the centre of figure. Another is to make the projectile very long, with its rear portion of wood, and its point of lead or iron, somewhat after the manner of an arrow; but these plans do not seem to be of much practical utility. The system by which the desired result is obtained with the greatest certainty is the rifle system.
Rifle System.—Spiral grooves are cut into the bore of the piece, or it is ribbed with spiral bands, and the projectile is so formed or prepared as to follow them as it passes along the bore of the piece. The principal question which now occupies the attention of those engaged in improving this species of cannon is to obtain the safest and surest means of effecting this object. Various plans have been tried to obtain the proposed object; nearly all may be ranged under the following heads:
1.The Flanged System.—This comprises all projectiles which have certain flanges or projections to fit into the grooves of the gun in loading. These are usually deep and few in number, rounded at their bottom edgesso as to cause the flanges or studs to pass up the inclined side when rotation is imparted. This is the system at present adopted in England. Though this plan affords a certain means of communicating the rifle motion, it has not always been found a safe one, probably from the wedging of the flanges in the grooves. Besides, the dirt from the burning of the powder collects in the grooves; and as it is difficult to clean them by the usual means, the projectile is liable to meet with obstruction in loading. To obviate these difficulties, the flanges are sometimes made of softer metal than the body of the projectile. Guns for flanged or studded projectiles usually have from 3 to 9 grooves, 0.15 to 0.25 inch deep.
2.The Compressive System.—By this system the projectile is forced by the action of the powder through the bore of a piece whose diameter without the grooves is less than the diameter of the projectile. Such are the projectiles for the breech-loading Krupp and Broadwell guns. These usually consist of cast iron or steel, and are covered with a coating of lead or other soft metal having horizontal ribs or corrugations, which is secured by a chemical solder, or cast into undercuts in the body of the shot. As the projectile is forced through the bore, an impression of the rifling is cut out of the ribs, the lead thus displaced finding room in the grooves between. This system has been found to work satisfactorily in breech-loading guns. The rifling should be shallow and consist of numerous grooves, slightly narrowing towards the muzzle. Large guns usually have from 20 to 76, from .05 to .08 inch deep. Experiments are now being made, with prospects of success, to substitute bands of soft copper encircling the projectile for the lead coating.
3.The Expansive System.—This system has been so exclusively used in the United States that it has frequently been called the American system. It embraces all projectiles which are loaded without regard to the rifling, but which are fitted with an expanding portion of some softer metal, as pewter, copper, wrought iron, orpapier-maché, which is forced into the grooves by the discharge. This system requires for its rifling fewer grooves than the compressive, but a somewhat greater number than the flanged system. Among the projectiles of this class used during the civil war were the Blakely, Dyer, Hotchkiss, James, Parrott, Reed, Schenkle, and Stafford. The principal objections to an expanding or compound projectile are its want of strength to resist a charge of powder proportionately as large as that employed for a simple projectile, and the danger of its breaking and wedging in the bore of the piece. Of late years, however, marked improvements have been made, and projectiles of this class can now be safely fired with double their former charges. The large projectiles of this description now used in the United States consist of the usual cast-iron body having a sabot, or ring of brass or copper either cast or screwed to its base. This ring is divided into an upper and lower flange or lip by an annular groove. When the gun is fired, the gases enter this groove, forcing the lower flange down upon the projectile and the upper or outer into the rifling of the gun, where it is kept during its passage through the bore.
Armstrong Projectile.—But one kind of projectile is used in the Armstrong breech-loading guns for the field service, and this is so constructed as to act as a shot, shell, or case-shot at pleasure. It consists of a very thin cast-iron shell, inclosing 42 segment-shaped pieces of cast iron built up so as to form a cylindrical cavity in the centre, which contains the bursting charge and the concussion-fuze. The exterior of the shell is thinly coated with lead, which is applied by placing the shell in a mold and pouring it in a melted state. The lead is also allowed to percolate among the segments, so as to fill up the interstices, the central cavity being kept open by the insertion of a steel core. In this state the projectile is so compact that it may be fired without injury, while its resistance to a bursting charge is so small that less than one ounce of powder is required to burst it. When the projectile is to be tired as a shot, it requires no preparation; but the expediency of using it otherwise than as a shell is doubted. To make it available as a shell, the bursting tube, the concussion- and time-fuzes, are all to be inserted; the bursting tube entering first and the time-fuze being screwed in at the apex. If the time-fuze be correctly adjusted, the shell will burst when it reaches within a few yards of the object; or failing in this, it will burst by the concussion-fuze when it strikes the object, or grazes the ground near it. If it be required to act as a canister-shot upon an enemy close to the gun, the regulation of the time-fuze must be turned to the zero of the scale, and then the shell will burst on leaving the gun. The Armstrong projectiles for the muzzle-loading guns have rows of brass or copper studs projecting from their sides to tit into the grooves of the gun, which are constructed on theshuntprinciple. The projectile is made of wrought iron, or low steel, with very thick sides. There is no fuze, the explosion resulting from the heat generated by the impact, and the crushing in of the thin cap which closes the mouth of the powder-chamber. The sides and bottom of the shell being thick enough to resist crushing by the impact, and also to resist the explosive force of the bursting charge, its effect will, after penetration, be expended on the backing of the armor, or the decks which the armor is intended to screen. Such projectiles are called “blind shells.”
Blakely Projectile.—Capt. Blakely’s projectile has an expanding cap attached to its base by means of a single tap-bolt in the centre. It is prevented from turning byradial grooves cast on the surface of the bottom of the projectile, into which the cup is pressed by the charge. The angle between the curved sides of the cup and the bottom of the projectile is filled with a lubricating material. On the forward part of the body are soft metal studs, more numerous than the grooves of the bore of the piece, that some of them may always form a bearing surface for the projectile against the lands. The driving sides of the grooves are deeper than the others.
Dyer Projectile.—The Dyer projectile is composed of a cast-iron body, and a soft metal expanding cup, attached to its base. The adhesion of the cup is effected by tinning the bottom of the projectile, and then casting the cup on to it. The cup is composed of an alloy of lead, tin, and copper, in certain proportions. This projectile, as improved by Mr. Taylor at the Washington Arsenal, gives good results for even as large a caliber as 12 inches.
French Projectile.—The projectile used in the French field service is made of cast iron, and has 12 zinc studs on its sides, arranged in pairs, so as to fit the 6 grooves of the gun. For the larger cannon projectiles, but 3 studs are used, and these are cast on the projectile, nearly opposite to its centre of gravity; the bearing sides of the studs are faced with white metal to diminish friction against the grooves of the bore. The shape of the grooves is such as to centre the projectile. The latter projectile is used with increasing, the former with grooves of uniform twist. Russian, Austrian, and Spanish artillery projectiles belong to the studded, or button class, but differ from each other in the details of their construction.
Hotchkiss Projectile.—The Hotchkiss projectile is composed of three parts: the body, the expanding ring of lead, and the cast-iron cup. The action of the charge is to crowd the cup against the soft metal ring, thereby expanding it into the rifling of the gun. The time-fuze projectile has deep longitudinal grooves cut on its sides to allow the flame to pass over and ignite the fuze. The last rifle projectile submitted by Mr. Hotchkiss has an expanding cup of brass attached to its base in a peculiar manner. The cup is divided into four parts by thin projections on the base of the projectile. This arrangement is intended to facilitate the expansion of the cup and to allow the flame to pass over to ignite the fuze.
James Projectile.—The expanding part of the James projectile consists of a hollow formed in the base of the projectile, and eight radial openings, which extend from this hollow to the surface for the passage of the flame of the charge, which presses against and expands into the grooves of the bore, an envelope or patch, composed of paper, canvas, and lead. In a later pattern of this projectile, the internal cavity and radial openings are omitted, and the outside is furrowed with longitudinal grooves which increase in depth towards the base of the projectile, forming inclined planes, up which the outer covering of lead and canvas is moved by the force of the charge and expanded into the rifling of the piece.
The first projectile used in Parrott guns was invented by Dr. Reed of Alabama, in 1856 or 1857, and was made at Parrott’s foundry. It consisted of a soft wrought-iron cup, slightly swedged to fit the grooves, upon which was cast the body of the shot.
Palliser Projectile.—This is the most formidable armor-piercing projectile in use. It owes its efficiency to the material used,—chilled cast iron. In the later forms the head only is chilled, the body being cast in sand. Both shot and shell are cast with a core. The shell is “blind.” The curve of the ogival head is struck with a radius of one and one-half times the diameter of the projectile.
Parrott Projectile.—Capt. Parrott’s projectile, as now made, is composed of a cast-iron body with a brass ring cast into a rabbet formed around its base. The flame presses against the bottom of the ring and underneath it so as to expand it into the grooves of the gun. To prevent the ring from turning in the rabbet, the latter is recessed at several points of its circumference.Parrott’s incendiary shellhas two compartments formed by a partition at right angles to its length. The lower and larger space is filled with a burning composition, the upper one is filled with a bursting charge of powder, which is fired by a time- or concussion-fuze. The burning composition is introduced through a hole in the bottom of the shell, which is stopped up with a screw-plug.
Sawyer Projectile.—The Sawyer projectile has upon its sides six rectangular flanges or ribs to fit into corresponding grooves of the bore. To soften the contact with the surface of the bore, the entire surface of the projectile is covered with a coating of lead and brass-foil. The soft metal at the corner of the base is made thicker than at the sides to admit of being expanded into the grooves, and thereby closing the windage. In the latest pattern of Sawyer projectiles, the flanges are omitted, and the projectiles are made to take the grooves by the expansion of the soft metal at the base, which is peculiarly shaped for this purpose.
Schenkle Projectile.—Schenkle’s projectile is composed of a cast-iron body, the posterior portion of which is a cone. The expanding portion is apapier-machésabot or ring, which is expanded into the rifling of the bore by being forced on to the cone by the action of the charge. On issuing from the bore the wad is blown to pieces, leaving the projectile unencumbered in its flight. A great difficulty has been found in practice in always getting a proper quality of material for the sabot, and in consequence, these projectiles have not been found to be reliable.
Scott Projectile.—The shell devised by Commander Scott of the British navy, for firing molten iron, has three ribs cast upon it, which fit grooves so constructed as to centre it in the bore of the gun when fired. The interior of this shell is lined with loam to prevent the heat of the charge from penetrating through to the bursting charge. It is supposed to be broken and its contents diffused on striking the object.
Whitworth Projectile.—The cross-section of the bore of the Whitworth gun is a hexagon with the corners slightly rounded. The projectile is first formed so that its cross-section is a circle, and its sides taper towards both ends. The middle portion is then carefully planed off to fit the bore of the gun. The Whitworth blind shell for firing against armor-plates, is made of tempered steel, and each end is closed with a screw. To prevent the heat of impact from acting too soon on the bursting charge, it is surrounded by one or more thicknesses of flannel. A 7-inch shell of this kind has been found to have sufficient strength and stiffness to penetrate 5 inches of wrought iron before bursting.
Confederate Projectiles.—The rifle projectiles used by the Confederates in the late war belonged, with a few exceptions, to the expanding class. Besides the above there are three kinds of projectiles much used in the U. S. service, viz.:
Absterdam Projectile.—The best form is cast in a single piece, and has an expanding ring of brass which projects three-eighths of an inch beyond the base of the projectile.
Eureka Projectile.—Consists of a cast-iron body in one piece, with a brass sabot; the sabot is an annular disk intended to move on the frustum of a cone with an expanding cup in rear to take the grooves.
Ordnance Projectile.—Consists of a cast-iron body, with a sabot composed of an alloy of lead and tin, which is cast on the base of the projectile, and is held in position by undercuts and dovetails, the action of the charge being to force the sabot on the cast-iron body and to make it take the grooves.
Projectiles of special construction were formerly much used for particular purposes, as:
Bar-shot, which consisted of two hemispheres or spheres connected by a bar of iron either rigidly or in such a manner as to traverse its length; these were useful in cutting the masts and rigging of ships.
Chain-shot.—This differed from bar-shot only in the mode of connection, which was a chain instead of a bar.
Chain-ball.—To arrest the motion of rotation of an oblong projectile thrown under high angles, and with a moderate velocity, it has been proposed to attach a light body to its posterior portion by means of a cord, or chain, which will offer a resistance to the flight of the projectile, and cause it to move with its point foremost.
Nail-ball.—A round projectile, having a projecting pin to prevent it from turning in the bore of the piece.
Grooved Ball.—An oblong projectile, having spiral grooves cut along its base, by means of which the action of the charge produces rotation about the longer axis of the projectile. Sometimes these grooves are cut in the forward part of the projectile for the action of the air. Neither of these plans has succeeded in practice.
Bullets.—A bullet is a leaden projectile discharged from a musket, fowling-piece, pistol, or similar weapon.
Spherical Bullets.—When smooth-bore muskets alone were used the bullets were chiefly spherical in form and made by casting; at present, however, spherical bullets are manufactured by a compressing machine invented by Mr. George Napier. They are denominated by the number contained in a pound. In consequence of the great improvements that have been made of late in small-arms, the spherical bullet is now very little employed for military purposes, its use being chiefly confined to case-shot.
Oblong Bullets.—Are denominated by their diameter and weight. About 1600, when rifles began to be used as a military weapon, spherical bullets were fired; in the early part of the 18th century, however, it was found that good results could be obtained by the use of oblong projectiles of elliptical form. The great difficulty, however, of loading the rifle, which was ordinarily accomplished by the blows of a mallet on a stout iron ramrod, prevented it from being generally used in regular warfare. The foregoing plan was afterwards improved by making the projectile a little smaller than the bore, and wrapping it with a patch of cloth greased to diminish the friction in loading. The improvements which have been made in the last thirty years have entirely overcome this difficulty, and rifles are now almost universally employed, although until 1855 the mass of the American infantry was armed with smooth-bored muskets. The first person to overcome the difficulty of loading rifles was M. Delavigne, an officer of the French infantry. His plan, proposed in 1827, was to make the projectile small enough to enter the bore easily and to attach it to a sabot, which, when in position, rested upon the shoulder of a cylindrical chamber formed at the bottom of the bore to contain the powder. In this position the projectile was struck two or three times with the ramrod, which expanded the lead into the grooves of the barrel. The method of Delavigne was afterwards improved by Thouvenin and Minié, both officers of the French service. The projectiles suggested by them were elongated in form and the metal of the projectile was forced into the grooves of the rifling by means of a plug or cup driven into the base of the projectile, which was cast hollow for that purpose. The cup used in the Minié bullet wits made of sheet-iron.Mr. Greener of England appears to have been the first person to utilize this expanding or dilating action. Various other bullets have been invented, of greater or less usefulness, as the Whitworth, Pritchett or Enfield, and those used in the French, Austrian, and Swiss services. In the British service, the Enfield bullet is employed; this has a perfectly smooth exterior, and a conical boxwood plug inserted into a cavity at the base; they are made by machinery which draws in a coil of leaden rod, unwinds it, cuts it to the required length, stamps out the bullets with steel dies, drops them into boxes, and conveys them away.
United States Bullets.—The bullets used in the U. S. service are of two kinds, one for the rifle and carbine ball-cartridge weighing 405 grains, the other for the revolver cartridge weighing 230 grains. The metal used is an alloy of 16 parts of lead and 1 part of tin. The bullet in shape is a cylinder surmounted by a conical frustum terminating in a spherical segment. It has three rectangular cannelures which contain the lubricant. This latter is protected by the case which covers more than half the length of the bullet. A dished cavity is made in the base of the bullet to bring it to the proper weight.
Projectiles, Theory of.Is the investigation of the path, ortrajectoryas it is called, of a body which is projected into space. A body thus projected is acted upon by two forces, theforce of projection, which, if acting alone, would carry the body onwards forever in the same direction and at the same rate; and theforce of gravity, which tends to draw the body downwards towards the earth. The force of projection acts only at the commencement of the body’s motion; the force of gravity, on the contrary, continues to act effectively during the whole time of the body’s motion, drawing it farther and farther from its original direction, and causing it to describe a curved path, which, if the body moved in a vacuum, would be accurately a parabola.
Trajectory in Vacuo.—This general theory is not the object of the present discussion, but simply the theory of projectiles as far as it relates to fire-arms. The path that the centre of gravity of a projectile would describe invacuowould be a parabola, and the greatest range given by an angle of fire of 45°. Under the same angles of fire the range would be proportional to the squares of the velocities, the velocity least at the summit of the trajectory, and the velocities at the two points in which the trajectory cuts the horizontal plane equal. The time of flight would be given for an angle of 45° by the formula: