Chapter 20

See Weever,Ancient Funerall Monuments(1631, 1661, Tooke’s edit., 1767); Philippe Labbe,Thesaurus epitaphiorum(Paris, 1666);Theatrum funebre extructum a Dodone Richea seu Ottone Aicher(1675); Hackett,Select and Remarkable Epitaphs(1757); de Laplace,Épitaphes sérieuses, badines, satiriques et burlesques(3 vols., Paris, 1782); Pulleyn,Churchyard Gleanings(c.1830); L. Lewysohn,Sechzig Epitaphien von Grabsteinen d. israelit. Friedhofes zu Worms(1855); Pettigrew,Chronicles of the Tombs(1857); S. Tissington,Epitaphs(1857); Robinson,Epitaphs from Cemeteries in London, Edinburgh, &c.(1859); le Blant,Inscriptions chrétiennes de la Gaule antérieures au VIIIesiècle(1856, 1865); Blommaert, Galliard, &c,Inscriptions funéraires et monumentales de la prov. de Flandre Orient(Ghent, 1857, 1860);Inscriptions fun. et mon. de la prov. d’Anvers(Antwerp, 1857-1860); Chwolson,Achtzehn hebräische Grabschriften aus der Krim(1859); J. Brown,Epitaphs, &c, in Greyfriars Churchyard, Edinburgh(1867); H.J. Loaring,Quaint, Curious, and Elegant Epitaphs(1872); J.K. Kippax,Churchyard Literature, a Choice Collection of American Epitaphs(Chicago, 1876); also the poet William Wordsworth’sEssay on Epitaphs.

EPITHALAMIUM(Gr.ἐπί, at or upon, andθάλαμος, a nuptial chamber), originally among the Greeks a song in praise of bride and bridegroom, which was sung by a number of boys and girls at the door of the nuptial chamber. According to the scholiast on Theocritus, one form, theκατακοιμητικόν, was employed at night, and another, theδιεγερτικόν, to arouse the bride and bridegroom on the following morning. In either case, as was natural, the main burden of the song consisted of invocations of blessing and predictions of happiness, interrupted from time to time by the ancient chorus ofHymen hymenaee. Among the Romans a similar custom was in vogue, but the song was sung by girls only, after the marriage guests had gone, and it contained much more of what modern morality would condemn as obscene. In the hands of the poets the epithalamium was developed into a special literary form, and received considerable cultivation. Sappho, Anacreon, Stesichorus and Pindar are all regarded as masters of the species, but the finest example preserved in Greek literature is the 18th Idyll of Theocritus, which celebrates the marriage of Menelaus and Helen. In Latin, the epithalamium, imitated from Fescennine Greek models, was a base form of literature, when Catullus redeemed it and gave it dignity by modelling hisMarriage of Thetis and Peleuson a lost ode of Sappho. In later times Statius, Ausonius, Sidonius Apollinaris and Claudian are the authors of the best-known epithalamia in classical Latin; and they have been imitated by Buchanan, Scaliger, Sannazaro, and a whole host of modern Latin poets, with whom, indeed, the form was at one time in great favour. The names of Ronsard, Malherbe and Scarron are especially associated with the species in French literature, and Marini and Metastasio in Italian. Perhaps no poem of this class has been more universally admired than theEpithalamiumof Spenser (1595), though he has found no unworthy rivals in Ben Jonson, Donne and Quarles. At the close ofIn MemoriamTennyson has appended a poem, on the nuptials of his sister, which is strictly an epithalamium.

EPITHELIAL, ENDOTHELIALandGLANDULAR TISSUES, in anatomy. Every surface of the body which may come into contact with foreign substances is covered with a protecting layer of cells closely bound to one anotherEpithelium.to form continuous sheets. These are epithelial cells (fromθηλή, a nipple). By the formation of outgrowths or ingrowths from these surfaces further structures, consisting largely or entirely of cells directly derived from the surface epithelium, may be formed. In this way originate the central nervous system, the sensitive surfaces of the special sense organs, the glands, and the hairs, nails, &c. The epithelial cells possess typical microscopical characters which enable them to be readily distinguished from all others. Thus the cell outline is clearly marked, the nucleus large and spherical or ellipsoidal. The protoplasm of the cell is usually large in amount and often contains large numbers of granules.

The individual cells forming an epithelial membrane are classified according to their shape. Thus we findflattened, orsquamous,cubical,columnar,irregular,ciliatedorflagellatedcells. Many of the membranes formed byVarieties.these cells are only one cell thick, as for instance is the case for the major part of the alimentary canal. In other instances the epithelial membrane may consist of a number of layers of cells, as in the case of the epidermis of the skin. Considering in the first place those membranes of which the cells are in a single layer we may distinguish the following:—

1.Columnar Epithelium(figs. 1 and 2).—This variety covers the main part of the intestinal tract,i.e.from the end of the oesophagus to the commencement of the rectum. It is also found lining the ducts of many glands. In a highly typical form it is found covering the villi of the small intestine (fig. 1). The external layer of the cell is commonly modified to form a thin membrane showing a number of very fine radially arranged lines, which are probably the expression of very minute tubular perforations through the membrane.

The close apposition of these cells to form a closed membrane is well seen when a surface covered by them is examined from above (fig. 3). The surfaces of the cells are then seen to form a mosaic, each cell area having a polyhedral shape.

2.Cubical Epithelium.—This differs from the former in that the cells are less in height. It is found in many glands and ducts (e.g.the kidney), in the middle ear, choroid plexuses of the brain, &c.

3.Squamous or Flattened Epithelium(fig. 4).—In this variety the cell is flattened, very thin and irregular in outline. It occurs as the covering epithelium of the alveoli of the lung, of the kidney glomerules and capsule, &c. The surface epithelial cells of a stratified epithelium are also of this type (fig. 4). Closely resembling these cells are those known as endothelial (see later).

4.Ciliated Epithelium(fig. 5).—The surface cells of many epithelial membranes are often provided with a number of very fine protoplasmic processes orcilia. Most commonly the cells are columnar, but other shapes are also found. During life the cilia are always in movement, and set up a current tending to drive fluid or other material on the surface in one direction along the membrane or tube lined by such epithelium. It is found lining the trachea, bronchi, parts of the nasal cavities and theuterus, oviduct, vas deferens, epididymis, a portion of the renal tubule, &c.

In the instance of some cells there may be but a single process from the exposed surface of the cell, and then the process is usually of large size and length. It is then known as aflagellum. Such cells are common among the surface cells of many of the simple animal organisms.

When the cells of an epithelial surface are arranged several layers deep, we can again distinguish various types:—

c, Columnar cells resting on

the fibrous true skin.

p, The so-called prickle cells.

g, Stratum granulosum.

h, Horny cells.

s, Squamous horny cells.

1.Stratified Epithelium(figs. 6 and 7).—This is found in the epithelium of the skin and of many mucous membranes (mouth, oesophagus, rectum, conjunctiva, vagina, &c.). Here the surface cells are very much flattened (squamous epithelium), those of the middle layer are polyhedral and those of the lowest layer are cubical or columnar. This type of epithelium is found covering surfaces commonly exposed to friction. The surface may be dry as in the skin, or moist,e.g.the mouth. The surface cells are constantly being rubbed off, and are then replaced by new cells growing up from below. Hence the deepest layer, that nearest the blood supply, is a formative layer, and in successive stages from this we can trace the gradual transformation of these protoplasmic cells into scaly cells, which no longer show any sign of being alive. In the moist mucous surfaces the number of cells forming the epithelial layer is usually much smaller than in a dry stratified epithelium.

2.Stratified Ciliated Epithelium.—In this variety the superficial cells are ciliated and columnar, between the bases of these are found fusiform cells and the lowest cells are cubical or pyramidal. This epithelium is found lining parts of the respiratory passages, the vas deferens and the epididymis.

3.Transitional Epithelium(fig. 8).—This variety of epithelium is found lining the bladder, and the appearance observed depends upon the contracted or distended state of the bladder from which the preparation was made. If the bladder was contracted the form seen in fig. 8 is obtained. The epithelium is in three or more layers, the superficial one being very characteristic. The cells are cubical and fit over the rounded ends of the cells of the next layer. These are pear-shaped, the points of the pear resting on the basement membrane. Between the bases of these cells lie those of the lowermost layer. These are irregularly columnar. If the bladder is distended before the preparation is made, the cells are then found stretched out transversely. This is especially the case with the surface cells, which may then become very flattened.

Considering epithelium from the point of view of function, it may be classified as protective, absorptive or secretory. It may produce special outgrowths for protective or ornamental purposes, such are hairs, nails, horns, &c., and for such purposes it may manufacture within itself chemical material best suited for that purpose,e.g.keratin; here the whole cell becomes modified. In other instances may be seen in the interior of the cells many chemical substances which indicate the nature of their work,e.g.fat droplets, granules of various kinds, protein, mucin, watery granules, glycogen, &c. In a typical absorbing cell granules of material being absorbed may be seen. A secreting cell of normal type forming specific substances stores these in its interior until wanted,e.g.fat as in sebaceous and mammary glands, ferment precursors (salivary, gastric glands, &c.), and various excretory substances, as in the renal epithelium.

Initially the epithelium cell might have all these functions, but later came specialization and therefore to most cells a specific work. Some of that work does not require the cell to be at the surface, while for other work this is indispensable, and hence when the surface becomes limited those of the former category are removed from the surface to the deeper parts. This is seen typically in secretory and excretory cells, which usually lie below the surface on to which they pour their secretions. If the secretion required at any one point is considerable, then the secreting cells are numerous in proportion and a typical gland is formed. The secretion is then conducted to the surface by a duct, and this duct is also lined with epithelium.

Glandular Tissues.—Every gland is formed by an ingrowth from an epithelial surface. This ingrowth may from the beginning possess a tubular structure, but in other instances may start as a solid column of cells which subsequentlyGlands.becomes tubulated. As growth proceeds, the column of cells may divide or give off offshoots, in which case a compound gland is formed. In many glands the number of branches is limited, in others (salivary, pancreas) a very large structure is finally formed by repeated growth and subdivision. As a rule the branches do not unite with one another, but in one instance, the liver, this does occur when a reticulated compound gland is produced. In compound glands the more typical or secretory epithelium is found forming the terminal portion of each branch, and the uniting portions form ducts and are lined with a less modified type of epithelial cell.

Glands are classified according to their shape. If the gland retains its shape as a tube throughout it is termed atubulargland, simple tubular if there is no division (large intestine),compoundtubular (fig. 9) if branching occurs (pyloric glands of stomach). In the simple tubular glands the gland may be coiled without losing its tubular form,e.g.in sweat glands. In the second main variety of gland the secretory portion is enlarged and the lumen variously increased in size. These are termedalveolarorsaccularglands. They are again subdivided into simple or compound alveolar glands, as in the case of the tubular glands (fig. 10). A further complication in the case of the alveolar glands may occur in the form of still smaller saccular diverticuli growing out from the main sacculi (fig. 11). These are termedalveoli.

The typical secretory cells of the glands are found lining theterminal portions of the ramifications and extend upwards to varying degrees. Thus in a typical acinous gland the cells are restricted to the final alveoli. The remaining tubes are to be considered mainly as ducts. In tubulo-alveolar glands the secreting epithelium lines the alveus as well as the terminal tubule.

The gland cells are all placed upon a basement membrane. In many instances this membrane is formed of very thin flattened cells, in other instances it is apparently a homogeneous membrane, and according to some observers is simply a modified part of the basal surface of the cell, while according to others it is a definite structure distinct from the epithelium.

In the secretory portion of the gland and in the smaller ducts the epithelial layer is one cell thick only. In the larger ducts there are two layers of cells, but even here the surface cell usually extends by a thinned-out stalk down to the basement membrane.

The detailed characters of the epithelium of the different glands of the body are given in separate articles (seeAlimentary Canal, &c.). It will besufficienthere to give the more general characters possessed by these cells. They are cubical or conical cells with distinct oval nuclei and granular protoplasm. Within the protoplasm is accumulated a large number of spherical granules arranged in diverse manners in different cells. The granules vary much in size in different glands, and in chemical composition, but in all cases represent a store of material ready to be discharged from the cell as its secretion. Hence the general appearance of the cell is found to vary according to the previous degree of activity of the cell. If it has been at rest for some time the cell contains very many granules which swell it out and increase its size. The nucleus is then largely hidden by the granules. In the opposite condition,i.e.when the cell has been actively secreting, the protoplasm is much clearer, the nucleus obvious and the cell shrunken in size, all these changes being due to the extrusion of the granules.

Endothelium and Mesothelium.—Lining the blood vessels, lymph vessels and lymph spaces are found flattened cells apposed to one another by their edges to form an extremely thin membrane. These cells are developed from theEndothelium and mesothelium.middle embryonic layer and are termed endothelium. A very similar type of cells is also found, formed into a very thin continuous sheet, lining the body-cavity,i.e.pleural pericardial, and peritoneal cavities. These cells develop from that portion of the mesoderm known as the mesothelium, and are therefore frequently termed mesothelial, though by many they are also included as endothelial cells.

A mesothelial cell is very flattened, thus resembling a squamous epithelial cell. It possesses a protoplasm with faint granules and an oval or round nucleus (fig. 12). The outline of the cell is irregularly polyhedral, and the borders may be finely serrated. The cells are united to one another by an intercellular cement substance which, however, is very scanty in amount, but can be made apparent by staining with silver nitrate when the appearance reproduced in the figure is seen. By being thus united together, the cells form a continuous layer. This layer is pierced by a number of small openings, known as stomata, which bring the cavity into direct communication with lymph spaces or vessels lying beneath the membrane. The stomata are surrounded by a special layer of cubical and granular cells. Through these stomata fluids and other materials present in the body-cavity can be removed into the lymph spaces.

Endothelialmembranes (fig. 13) are quite similar in structure to mesothelial. They are usually elongated cells of irregular outline and serrated borders.

By means of endothelial or mesothelial membranes the surfaces of the parts covered by them are rendered very smooth, so that movement over the surface is greatly facilitated. Thus the abdominal organs can glide easily over one another within the peritoneal cavity; the blood or lymph experiences the least amount of friction; or again the friction is reduced to a minimum between a tendon and its sheath or in the joint cavities. The cells forming these membranes also possess further physiological properties. Thus it is most probable that they play an active part in the blood capillaries in transmitting substances from the blood into the tissue spaces, or conversely in preventing the passage of materials from blood to tissue space or from tissue space to blood. Hence the fluid of the blood and that of the tissue space need not be of the same chemical composition.

(T. G. Br.)

EPITOME(Gr.ἐπιτομή, fromἐπιτέμνειν, to cut short), an abridgment, abstract or summary giving the salient points of a book, law case, &c., a short and concise account of any particular subject or event. By transferenceepitomeis also used to express the representation of a larger thing, concrete or abstract, reproduced in miniature. Thus St Mark’s was called by Ruskin the “epitome of Venice,” as it embraces examples of all the periods of architecture from the 10th to the 19th centuries.

EPOCH(Gr.ἐποχή, holding in suspense, a pause, fromἐπέχειν, to hold up, to stop), a term for a stated period of time, and so used of a date accepted as the starting-point of an era or of a new period in chronology, such as the birth of Christ. It is hence transferred to a period which marks a great change, whether in the history of a country or a science, such as a great discovery or invention. Thus an event may be spoken of as “epoch-making.” The word is also used, synonymously with “period,” for any space of time marked by a distinctive condition or by a particular series of events.

In astronomy the word is used for a moment from which time is measured, or at which a definite position of a body or a definite relation of two bodies occurs. For example, the position of a body moving in an orbit cannot be determined unless its position at some given time is known. The given time is then the epoch; but the term is often applied to the mean longitude of the body at the given time.

EPODE, in verse, the third part in an ode, which followed the strophe and the antistrophe, and completed the movement; it was calledἐπῳδὸς περίοδοςby the Greeks. At a certain moment the choirs, which had chanted to right of the altar or stage and then to left of it, combined and sang in unison, or permitted the coryphaeus to sing for them all, standing in the centre. When, with the appearance of Stesichorus and the evolution of choral lyric, a learned and artificial kind of poetry began to be cultivated in Greece, a new form, theεἶδος ἐπῳδικόν, or epode-song, came into existence. It consisted of a verse of trimeter iambic, followed by a dimeter iambic, and it is reported that, although the epode was carried to its highest perfection by Stesichorus, an earlier poet, Archilochus, was really the inventor of this form. The epode soon took a firm place in choral poetry, which it lost when that branch of literature declined. But it extended beyond the ode, and in the early dramatists we find numerous examples of monologues and dialogues framed on the epodical system. In Latin poetry the epode was cultivated, in conscious archaism, both as a part of the ode and as an independent branch of poetry. Of the former class, the epithalamia of Catullus, founded on an imitation of Pindar, present us with examples of strophe, antistrophe and epode; and it has been observed that the celebrated ode of Horace, beginningQuem virum aut heroa lyra vel acri, possesses this triple character. But the word is now mainly familiar from an experiment of Horace in the second class, for he entitled his fifth book of odesEpodon liberor the Book of Epodes. He says in the course of these poems, that in composing them he was introducing a new form, at least in Latin literature, and that he was imitating the effect of the iambic distichs invented by Archilochus. Accordingly we find the first ten of these epodescomposed in alternate verses of iambic trimeter and iambic dimeter, thus:—

“At o Deorum quicquid in coelo regitTerras et humanum genus.”

“At o Deorum quicquid in coelo regit

Terras et humanum genus.”

In the seven remaining epodes Horace has diversified the measures, while retaining the general character of the distich. This group of poems belongs in the main to the early youth of the poet, and displays a truculence and a controversial heat which are absent from his more mature writings. As he was imitating Archilochus in form, he believed himself justified, no doubt, in repeating the sarcastic violence of his fierce model. The curious thing is that these particular poems of Horace, which are really short lyrical satires, have appropriated almost exclusively the name of epodes, although they bear little enough resemblance to the genuine epode of early Greek literature.

EPONA, a goddess of horses, asses and mules, worshipped by the Romans, though of foreign, probably Gallic, origin. The majority of inscriptions and images bearing her name have been found in Gaul, Germany and the Danube countries; of the few that occur in Rome itself most were exhumed on the site of the barracks of theequites singulares, a foreign imperial body-guard mainly recruited from the Batavians. Her name does not appear in Tertullian’s list of theindigetes di, and Juvenal contrasts her worship unfavourably with the old Roman Numa ritual. Her cult does not appear to have been introduced before imperial times, when she is often called Augusta and invoked on behalf of the emperor and the imperial house. Her chief function, however, was to see that the beasts of burden were duly fed, and to protect them against accidents and malicious influence. In the countries in which the worship of Epona was said to have had its origin it was a common belief that certain beings were in the habit of casting a spell over stables during the night. The Romans used to place the image of the goddess, crowned with flowers on festive occasions, in a sort of shrine in the centre of the architrave of the stable. In art she is generally represented seated, with her hand on the head of the accompanying horse or animal.

See Tertullian, Apol. 16; Juvenal viii. 157; Prudentius,Apoth.197; Apuleius,Metam.iii. 27; articles in Daremberg and Saglio’sDict, des antiquitésand Pauly-Wissowa’sRealencyclopädie.

EPONYMOUS, that which gives a name to anything (Gr.ἐπώνυμος, fromὄνομα, a name), a term especially applied to the mythical or semi-mythical personages, heroes, deities, &c. from whom a country or city took its name. Thus Pelops is the giver of the name to the Peloponnese. At Athens the chief archon of the year was known as theἄρχων ἐπώνυμος, as the year was known by his name. There was a similar official in ancient Assyria. In ancient times, as in historical and modern cases, a country or a city has been named after a real personage, but in many cases the person has been invented to account for the name.

EPPING, a market town in the Epping parliamentary division of Essex, England, 17 m. N.N.E. from London by a branch of the Great Eastern railway. Pop. of urban district (1901), 3789. The town lies high and picturesquely, at the northern outskirts of Epping Forest. The modern church of St John the Baptist replaces the old parish church of All Saints in the village of Epping Upland 2 m. N.W. This is in part Norman. There is considerable trade in butter, cheese and sausages.

Epping Forest forms part of the ancient Waltham Forest, which covered the greater part of the county. All the “London Basin,” within which the Forest lies, was densely wooded. The Forest became one of the commonable lands of Royal Chases or hunting-grounds. It was threatened with total disafforestation, when under the Epping Forest Act of 1871 a board of commissioners was appointed for the better management of the lands. The corporation of the city of London then acquired the freehold interest of waste land belonging to the lords of the manor, and finally secured 5559½ acres, magnificently timbered, to the use of the public for ever, the tract being declared open by Queen Victoria in 1882. The Ancient Court of Verderers was also revived, consisting of an hereditary lord warden together with four verderers elected by freeholders of the county. The present forest lies between the valleys of the Roding and the Lea, and extends southward from Epping to the vicinity of Woodford and Walthamstow, a distance of about 7 m. It is readily accessible from the villages on its outskirts, such as Woodford, Chingford and Loughton, which are served by branches of the Great Eastern railway. These are centres of residential districts, and, especially on public holidays in the summer, receive large numbers of visitors.

EPPS, the name of an English family, well known in commerce and medicine. In the second half of the 18th century they had been settled near Ashford, Kent, for some generations, claiming descent from an equerry of Charles II., but were reduced in circumstances, whenJohn Eppsrose to prosperity as a provision merchant in London, and restored the family fortunes. He had four sons, of whomJohn Epps(1805-1869),George Napoleon Epps(1815-1874), andJames Epps(1821-1907) were notable men of their day, the two former as prominent doctors who were ardent converts to homoeopathy, and James as a homoeopathic chemist and the founder of the great cocoa business associated with his name. Among Dr G.N. Epps’s children were Dr Washington Epps, a well-known homoeopathist, Lady Alma-Tadema, and Mrs Edmund Gosse.

ÉPRÉMESNIL(ÉsprémesnilorÉpréménil),JEAN JACQUES DUVAL D’(1745-1794), French magistrate and politician, was born in India on the 5th of December 1745 at Pondicherry, his father being a colleague of Dupleix. Returning to France in 1750 he was educated in Paris for the law, and became in 1775conseillerin the parlement of Paris, where he soon distinguished himself by his zealous defence of its rights against the royal prerogative. He showed bitter enmity to Marie Antoinette in the matter of the diamond necklace, and on the 19th of November 1787 he was the spokesman of the parlement in demanding the convocation of the states-general. When the court retaliated by an edict depriving the parlement of its functions, Éprémesnil bribed the printers to supply him with a copy before its promulgation, and this he read to the assembled parlement. A royal officer was sent to the palais de justice to arrest Éprémesnil and his chief supporter Goislard de Montsabert, but the parlement (5th of May 1788) declared that they were all Éprémesnils, and the arrest was only effected on the next day on the voluntary surrender of the two members. After four months’ imprisonment on the island of Ste Marguerite, Éprémesnil found himself a popular hero, and was returned to the states-general as deputy of the nobility of the outlying districts of Paris. But with the rapid advance towards revolution his views changed; in hisRéflexions impartiales... (January 1789) he defended the monarchy, and he led the party among the nobility that refused to meet with the third estate until summoned to do so by royal command. In the Constituent Assembly he opposed every step towards the destruction of the monarchy. After a narrow escape from the fury of the Parisian populace in July 1792 he was imprisoned in the Abbaye, but was set at liberty before the September massacres. In September 1793, however, he was arrested at Le Havre, taken to Paris, and denounced to the Convention as an agent of Pitt. He was brought to trial before the revolutionary tribunal on the 21st of April 1794, and was guillotined the next day.

D’Éprémesnil’s speeches were collected in a small volume in 1823. See also H. Carré,Un Précurseur inconscient de la Révolution(Paris, 1897).

EPSOM, a market town in the Epsom parliamentary division of Surrey, England, 14 m. S.W. by S. of London Bridge. Pop. of urban district (1901), 10,915. It is served by the London & South-Western and the London, Brighton & South Coast railways, and on the racecourse on the neighbouring Downs there is a station (Tattenham Corner) of the South-Eastern & Chatham railway. The principal building is the parish church of St Martin, a good example of modern Gothic, the interior of which contains some fine sculptures by Flaxman and Chantrey. Epsom (a contraction of Ebbisham, still the name of the manor) first came into notice when mineral springs were discovered thereabout 1618. For some time after their discovery the town enjoyed a wonderful degree of prosperity. After the Restoration it was often visited by Charles II., and when Queen Anne came to the throne, her husband, Prince George of Denmark, made it his frequent resort. Epsom gradually lost its celebrity as a spa, but the annual races held on its downs arrested the decay of the town. Races appear to have been established here as early as James I’s residence at Nonsuch, but they did not assume a permanent character until 1730. The principal races—the Derby and Oaks—are named after one of the earls of Derby and his seat, the Oaks, which is in the neighbourhood. The latter race was established in 1779, and the former in the following year. The spring races are held on a Thursday and Friday towards the close of April; and the great Epsom meeting takes place on the Tuesday and three following days immediately before Whitsuntide,—the Derby on the Wednesday, and the Oaks on the Friday (seeHorse-Racing). The grand stand was erected in 1829, and subsequently enlarged; and there are numerous training stables in the vicinity. Close to the town are the extensive buildings of the Royal Medical Benevolent College, commonly called Epsom College, founded in 1855. Scholars on the foundation must be the sons of medical men, but in other respects the school is open. In the neighbourhood is the Durdans, a seat of the earl of Rosebery.

EPSOM SALTS, heptohydrated magnesium sulphate, MgSO4·7H2O, themagnesii sulphasof pharmacy (Ger.Bittersalz). It occurs dissolved in sea water and in most mineral waters, especially in those at Epsom (from which place it takes its name), Seidlitz, Saidschutz and Pullna. It also occurs in nature in fibrous excrescences, constituting the mineral epsomite or hair-salt; and as compact masses (reichardite), as in the Stassfurt mines. It is also found associated with limestone, as in the Mammoth Caves, Kentucky, and with gypsum, as at Montmartre. Epsom salts crystallizes in the orthorhombic system, being isomorphous with the corresponding zinc and nickel sulphates, and also with magnesium chromate. Occasionally monoclinic crystals are obtained by crystallizing from a strong solution. It is used in the arts for weighting cotton fabrics, as a top-dressing for clover hay in agriculture, and in dyeing. In medicine it is frequently employed as a hydragogue purgative, specially valuable in febrile diseases, in congestion of the portal system, and in the obstinate constipation of painters’ colic. In the last case it is combined with potassium iodide, the two salts being exceedingly effective in causing the elimination of lead from the system. It is also very useful as a supplement to mercury, which needs a saline aperient to complete its action. The salt should be given a few hours after the mercury,e.g.in the early morning, the mercury having been given at night. It possesses the advantage of exercising but little irritant effect upon the bowels. Its nauseous bitter taste may to some extent be concealed by acidifying the solution with dilute sulphuric acid, and in some cases where full doses have failed the repeated administration of small ones has proved effectual.

For the manufacture of Epsom salts and for other hydrated magnesium sulphates seeMagnesium.

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