Chapter CXLIII: Act 1895: , may be given to a married woman on applying to (32)

AMHURST, NICHOLAS (1697-1742), English poet and political writer, was born at Marden, Kent, on the 16th of October 1697. He was educated at the Merchant Taylors' School, and received an exhibition (1716) to St John's College, Oxford. In 1719 he was expelled from the university, ostensibly for his irregularities of conduct, but in reality, according to his own account, because of his whig principles, which were sufficiently evident in a congratulatory epistle to Addison, in Protestant Popery; or the Convocation (1718), an attack on the opponents of Bishop Hoadly, and in The Protestant Session ... by a member of the Constitution Club at Oxford (1719), addressed to James, first Earl Stanhope, and printed anonymously, but doubtless by Amhurst. He had satirized Oxford morals in Strephon's Revenge; a Satire on the Oxford Toasts (1718), and he attacked from time to time the administration of the university and its principal members. An old Oxford custom on public occasions permitted some person to deliver from the rostrum a humorous, satirical speech, full of university scandal. This orator was known as Terrae filius. In 1721 Amhurst produced a series of bi-weekly satirical papers under this name, which ran for seven months and incidentally provides much curious information. These publications were reprinted in 1726 in two volumes as Terrae Filius; or the secret history of the University of Oxford; in several essays.... He collected his poems in 1720, and wrote another university satire, Oculus Britanniae, in 1724. On leaving Oxford for London he became a prominent pamphleteer on the opposition side. On the 5th of December 1726 he issued the first number of the Craftsman, a weekly periodical, which he conducted under the pseudonym of Caleb D'Anvers. The paper contributed largely to the final overthrow of Sir Robert Walpole's government, and reached a circulation of 10,000 copies. For this success Amhurst's editorship was not perhaps chiefly responsible. It was the organ of Lord Bolingbroke and William Pulteney, the latter of whom was a frequent and caustic contributor. In 1737 an imaginary letter from Colley Cibber was inserted, in which he was made to suggest that many plays by Shakespeare and the older dramatists contained passages which might be regarded as seditious. He therefore desired to be appointed censor of all plays brought on the stage. This was regarded as a "suspected" libel, and a warrant was issued for the arrest of the printer. Amhurst surrendered himself instead, and suffered a short imprisonment. On the overthrow of the government in 1742 the opposition leaders did nothing for the useful editor of the Craftsman, and this neglect is said to have hastened Amhurst's death, which took place at Twickenham on the 27th of April 1742.

AMIANTHUS, a corruption of amiantus (Gr. amiautos, undefiled), a name applied to the finer kinds of asbestos (q.v.), in consequence, it is said, of the mineral being unaffected by fire. Some of the finest amianthus, with long silky flexible fibres, occurs in the district of the Tarentaise in Savoy. According to Dr J. W. Evans, the ancient amianthus, derived mostly from Karystos in Euboea and from Cyprus, was probably a fibrous serpentine, or chrysotile (now called locally pampakopetrai or cotton-stone).

See Mineralogical Mag. (London) vol. xiv. no. 65 (1906), art. by J. W. Evans.

AMICABLE NUMBERS, two numbers so related that the sum of the factors of the one is equal to the other, unity being considered as a factor. Such a pair are 220 and 284; for the factors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the factors of 284 are 1, 2, 4, 71, and 142, of which the sum is 220. Amicable numbers were known to the Pythagoreans, who accredited them with many mystical properties. A general formula by which these numbers could be derived was invented by the Arabian astronomer Tobit ben Korra (836-901): if p=3.2m-1, q=3.2m-1-1 and r=9.22m-1-1, where m is an integer and p,q,r prime numbers, then 2m pq and 2m r are a pair of amicable numbers. This formula gives the pairs 220 and 284, 17,296 and 18,416, 9,463,584 and 9,437,056. The pair 6232 and 6368 are amicable, but they cannot be derived from this formula. Amicable numbers have been studied by Al Madshritti (d. 1007), Rene Descartes, to whom the formula of Tobit ben Korra is sometimes ascribed, C. Rudolphus and others.

AMICE (earlier forms: amyt, amys, O. Fr. amit, Lat. amictus, from amicire, to throw or wrap round, the change of t to s being probably due to an early confusion with the aumuce: see ALMUCE), a liturgical vestment of the Western Church. It is a rectangular piece of cloth which is wrapped round the neck, shoulders and breast. Sometimes, more particularly in Germany, it is called the humerale (from humerus, shoulder). According to modern Roman use, laid down by the decree of the Congregation of Rites in 1819, the amice must be of linen or of a hempen material, not wool; and, as directed by the new Roman Missal (1570), a small cross must be sewn or embroidered in the middle of it. In putting it on it is first laid on the head, then allowed to fall on the shoulders, and finally folded round the chest and tied with the strings attached for that purpose (see fig. 1). The amice is now worn under the alb, except at Milan and Lyons, where it is put on over it. The vestment was at first a perfectly plain white cloth, but in the 12th century the custom arose of decorating the upper border with a band of embroidery, the parure (parura) or "apparel." This was abandoned at Rome about the end of the 15th century and is not prescribed in the Missal; it survived, however, in many parts of Europe till much later. This apparel, when the vestment has been adjusted, forms a sort of stiff collar which appears above the chasuble or dalmatic (see fig. 2). In some exceptional cases, as at Milan, it has become detached from the amice and is fixed like a collar to the chasuble.

The Latin word amictus was applied to any wrap-like garment, and, according to Father Braun, the liturgical amice originated in the ordinary neck-cloth worn by all classes of Romans. It had at the outset no liturgical significance whatever, and was simply adopted by the clergy for the same reason that the clergy of the 18th century wore wigs--because it was part of the full dress of ordinary life. The first record of its ecclesiastical use is at Rome in the 8th century, when it was worn only with the dalmatic and was known as the anabolagium (anagolaium, anagolagium, from Gr. anabolaion), a name it continued to bear at Rome till the 13th century. In the 9th century it spread to the other countries that adopted the Roman use: it is mentioned in an inventory of vestments given by Abbot Angilbert (d. 814) to the monastery at Centula (St Riguier) and in the de clericorum institutione of Hrabanus Maurus (c. 820). The amice was worn first simply as a shoulder-cloth, but at the end of the 9th century the custom grew up of putting it on over the head and of wearing it as a hood, either while the other vestments were being put on or, according to the various uses of local churches, during part of the Mass, though never during the canon. This ceased at Rome at the same time as the apparel disappeared; but two relics of it survive--(1) in the directions of the Missal for putting on the amice, (2) in the ordination of subdeacons, when the bishop lays the vestment on the ordinand's head with the words, "Take the amice, which symbolizes discipline over the tongue, &c." The priest too in putting it on prays, "Place on my head the helmet of salvation, &c."

The amice, whatever its origin or symbolism, became specifically a vestment associated with the sacrifice of the Mass, and as such it was rejected with the other "Mass vestments" in England at the Reformation. Its use has, however, been revived in many Anglican churches, the favourite form being the medieval apparelled amice. (See VESTMENTS.) A vestment akin to the amice is also worn in the Armenian and some other oriental churches, but it is unknown to the Orthodox Eastern Church.

Akin to the amice is a vestment peculiar to the popes, the fanone (Med. Lat. fano, "cloth," Goth. fana, "cloth," Mod. Ger. Fahne, "a flag"), also called the orale (from ora, an edge, border). This is at present a circular broad collar of two thicknesses of silk, ornamented with gold stripes and a gold- embroidered cross (see fig. 3). It is put on after the alb, &c., and under the tunicle, dalmatic and chasuble, but then drawn up so as to fall over the latter like a collar. The fanone was originally a cloth like the amice and was wrapped round neck and shoulders; until the 15th century, moreover, it was not worn with the amice. Since then, however, both vestments have been worn, one under, the other over, the alb. It is worn by the popes only on certain special days or occasions, and forms part of the vestments in which they are buried.

See Joseph Braun, S. J., Die liturgische Gewandung, pp. 21-56 (Freiburg im Breisgau, 1907), and bibliography to the article VESTMENTS.

AMICI, GIOVANNI BATTISTA (1786-1863), Italian astronomer and microscopist, was born on the 25th of March 1786 at Modena. After studying at Bologna, he became professor of mathematics at Modena, and in 1831 was appointed inspector-general of studies in the duchy. A few years later he was chosen director of the observatory at Florence, where he also lectured at the museum of natural history. He died at Florence on the 10th of April 1863. His name is best known for the improvements he effected in the mirrors of reflecting telescopes and especially in the construction of the microscope. He was also a diligent and skilful observer, and busied himself not only with astronomical subjects, such as the double stars, the satellites of Jupiter and the measurement of the polar and equatorial diameters of the sun, but also with biological studies of the circulation of the sap in plants, the fructification of plants, infusoria, &c.

AMICIS, EDMONDO DE (1846-1908), Italian writer, was born at Oneglia, in Liguria, on the 21st of October 1846. After some schooling at Cuneo and Turin, he was sent to the Military School at Modena, from which he was appointed to a lieutenancy in the 3rd regiment of the line in 1865. He fought at the battle of Custozza in 1866. In 1867 he became director of the Italia Militare, Florence. In the following year he published his first book, La Vita Militare, which consisted of sketches of military life, and attained wide popularity. After the overthrow of the pope's temporal power in 1870, De Amicis retired from the army and devoted himself to literature, making his headquarters at Turin. Always a traveller by inclination, he found opportunity for this in his new leisure, and some of his most popular books have been the product of his wanderings. Several of these have been translated into English and the other principal languages of Europe. The most important of these are his descriptions of Spain (1873), Holland (1874), Constantinople (1877) and Morocco (1879). These gained him a well- deserved reputation as a brilliant depicter of scenery and the external aspects of life; solid information is not within their sphere; and much of their success is owing to the opportunities they afford for spirited illustration. Subsequently De Amicis greatly extended his fame as a writer of fiction, especially by Il Romanzo d' un Maestro, and the widely read Il Cuore (translated into English as An Italian Schoolboy's Journal); later volumes from his pen being La Carozza di tutti (centring round an electric tram), Memorie, Speranze e glorie, Ricordi d' infanzia e di scuola, L' Idioma gentile, and a volume of short stories, Nel Regno dell' Amore. He died suddenly of heart disease at Bordighera on the 12th of March 1908.

AMICUS CURIAE (Lat. for "a friend of the court"), a term used primarily in law, signifying a person (usually a member of the bar) who, having special knowledge but not being engaged in the suit, intervenes during its hearing to give information for the assistance of the court, either upon some fact relevant to the issue or upon a point of law, such as the hearing of a local custom, the precedent of some decided case, &c.

AMIDINES, in organic chemistry, the name given to compounds of general formula R.C:(NH).NH2, which may be considered as derived from the acid-amides by replacement of oxygen by the divalent imino (=NH) group. They may be prepared by the action of ammonia or amines on imide chorides, or on thiamides (O. Wallach, A. Bernthsen); by the action of ammonium chloride or hydrochlorides of amines on nitriles; by condensing amines and amides in presence of phosphorus trichloride; by the action of hydrochloric acid on acid-amides (O. Wallach, Ber., 1882, 15, p. 208); and by the action of ammonia or amines on imino-ethers (A. Pinner, Ber., 1883, 16, p. 1647; 1884, 17, p. 179). They are monacid bases, which are not very stable; they readily take up the elements of water (when boiled with acids or alkalies), yielding amides and ammonia. On dry distillation they yield nitriles and ammonia. When warmed with sulphuretted hydrogen they yield thiamides, R.C:(NH).NHR+H2S = R.C(NH2)(SH)NHR = R.CSNH2 + NH2.R or RCS.NHR + NH3. With b-ketonic esters, HO(CH3)C:CH.CO2R, they yield oxypyrimidines (A. Pinner, Ber., 1890, 23, p. 3820).

Formamidine, HC:(NH)NH2, is only known in the form of its salts, the hydrochloride being obtained by the action of ammonia on the hydrochloride of formimido-ethyl ether (A. Pinner, Ber., 1883, 16, p. 357). Acetamidine, CH3C:(NH).NH2, is alkaline in reaction, and readily splits up into acetic acid and ammonia when warmed with acids. Its hydrochloride melts at 163 deg. C., and crystallizes from alcohol in colourless deliquescent prisms. Acetic anhydride converts the base into an acetamino-dimethyl pyrimidine, acetic acid and acetamide being also formed.

Benzamidine, C6H5.C:(NH)NH2, forms colourless crystals which melt at 75-80 deg. C. When warmed it breaks down into ammonia and cyanphenine (s-triphenyl triazine). It condenses with acetic anhydride to form a methyldiphenyl triazine, acetamide being also formed; with acetyl-acetone to form dimethylphenyl pyrimidine (A. Pinner, Ber., 1893, 26, p. 2125); and with trimethylene bromide to form a phenyl tetrahydropyrimidine (Pinner). H. v. Pechmann (Ber., 1895, 28, p. 2362) has shown that amidines of the type R.C: (NY).NHZ sometimes react as if they possessed the constitution R.C: (NZ).NHY; but this only appears to occur when Y and Z are groups which function in the same way. If Y and Z are groups which behave very differently, then there is apparently no tautomerism and a definite formula can be given to the compound.

The formulae of the ringed compounds mentioned above are here shown:

N--C--(CH3)
// \\
R.C CH
\ /
N==C--(OH)
Oxypyrimidine.

N--C--(CH3)
// \\
CH3.C CH
\ /
N==C--(NHCOCH3)
Acetaminodimethyl pyrimidine.

C6H5
/
N--C
// \\
C6H5.C N
\ /
N==C
\
CH3
Methyl diphenyl triazine.

N--CH2
// \
C6H5.C CH2
\ /
NH--CH2
Phenyl tetrahydropyrimidine.

AMIEL, HENRI FREDERIC (1821-1881), Swiss philosopher and critic, was born at Geneva on the 27th of September 1821. He was descended from a Huguenot family driven to Switzerland by the revocation of the edict of Nantes. Losing his parents at an early age, he travelled widely, became intimate with the intellectual leaders of Europe and made a special study of German philosophy in Berlin. In 1849 he was appointed professor of aesthetics at the academy of Geneva, and in 1854 became professor of moral philosophy. These appointments, conferred by the democratic party, deprived him of the support of the aristocratic party; which comprised nearly all the culture of the city. This isolation inspired the one book by which Amiel lives, the Journal Intime, which, published after his death, obtained a European reputation. It was translated into English by Mrs Humphry Ward. Although second-rate as regards productive power, Amiel's mind was of no inferior quality, and his journal gained a sympathy which the author had failed to obtain in his life. In addition to the Journal, he produced several volumes of poetry and wrote studies on Erasmus, Madame de Stael and other writers. He died in Geneva on the 11th of March 1881. His chief poetical works are Grains de mil, Il penseroso, Part du reve, Les Etrangeres, Charles le Temeraire, Romancero historique, Jour a jour.

See Life of Amiel by Mdlle Berthe Vadier (Paris, 1885); Paul Bourget, Nouveaux essais (Paris, 1885); E. Scherer, introd. to the Journal and in Etudes sur la litt. contemp. (vol. viii.).

AMIENS, a city of northern France, capital of the department of Somme, on the left bank of the Somme, 81 m. N. of Paris on the Northern railway to Calais. Pop. (1906) 78,407. Amiens was once a place of great strength, and still possesses a citadel of the end of the 16th century, but the ramparts which surrounded it have been replaced by boulevards, bordered by handsome residences. Suburbs, themselves bounded by another line of boulevards, have arisen beyond these limits, and the city also extends to the right bank of the Somme. The busy quarter of Amiens lies between the river and the railway, which for some distance follows the inner line of boulevards. The older and more picturesque quarter is situated directly on the Somme; its narrow and irregular streets are intersected by the eleven arms of the river and it is skirted on the north by the canal derived therefrom. Besides its boulevards Amiens has the ample park or Promenade de la Hotoie to the west and several fine squares, notably the Place Longueville and the Place St Denis, in which stands the statue of the famous 17th-century scholar Charles Ducange. The cathedral (see ARCHITECTURE: Romanesque and Gothic Architecture in France; and CATHEDRAL), which is perhaps the finest church of Gothic architecture in France, far exceeds the other buildings of the town in importance. Erected on the plans of Robert de Luzarches, chiefly between 1220 and 1288, it consists of a nave, nearly 140 ft. in height, with aisles and lateral chapels, a transept with aisles, and a choir (with deambulatory) ending in an apse surrounded by chapels. The total length is 469 ft., the breadth 216 ft. The facade, which is flanked by two square towers without spires, has three portals decorated with a profusion of statuary, the central portal having a remarkable statue of Christ of the 13th century; they are surmounted by two galleries, the upper one containing twenty-two statues of the kings of Judah in its arcades, and by a fine rose-window. A slender spire rises above the crossing. The southern portal is remarkable for a figure of the Virgin and other statuary. In the interior, which contains beautifully carved stalls, a choir-screen in the flamboyant style and many other works of art, the most striking features are the height of the nave and the boldness of the columns supporting the vaulting. The chief of the other churches of Amiens is St Germain (15th century), which has some good stained glass. The hotel de ville, begun in 1550, a belfry of the 14th and 18th centuries and several old mansions are of interest. Amiens has a rich library and admirable collections of paintings, sculptures and antiquities in the museum of Picardy. Its learned associations include the Societe des Antiquaires de Picardie, by whom the museum was built in 1854-1864. The city is the seat of a bishop, a prefect, a court of appeal and a court of assizes, and headquarters of the II. Army Corps. There are also tribunals of first instance and of commerce, a board of trade-arbitrators, a chamber of commerce and a branch of the Bank of France. The educational institutions include lycees for boys and girls, training-colleges for teachers, a preparatory school of medicine, a school of music and a school of iron-working and wood-working. The textile industries for which Amiens has been celebrated since the middle ages include manufactures of velvet, cotton-, wool-, silk-, hemp- and flax-spinning, and the weaving of hosiery and a variety of mixed fabrics. Manufactures of machinery, chemicals, blacking, polish and sugar, and printing, dyeing and iron-founding are also carried on. Market gardens, known as hortillonnages, intersected by small canals derived from the Somme and Avre, cover a considerable area to the north-east of Amiens; and the city has trade in vegetables, as well as in grain, sugar, wool, oil-seeds and the duck-pasties and macaroons for which it is renowned.

Amiens occupies the site of the ancient Samarobriva, capital of the Ambiani, from whom it probably derives its name. At the beginning of the 4th century Christianity was preached there by St Firmin, its first bishop. During the middle ages its territory formed the countship of Amienois. The authority of the counts was, however, balanced by that of the bishops, and early in the 12th century the citizens, profiting by this rivalry, gained a charter of enfranchisement. The fief became for the first time a dependency of the French crown in 1185, when Philip of Alsace, count of Flanders, ceded it to Philip Augustus. It more than once passed out of the power of the French kings, notably in 1435, when, by the treaty of Arras, it came into the possession of the dukes of Burgundy, to whom it belonged till 1477. Surprised by the Spaniards in 1597, the city was recaptured from them after a long siege by Henry IV. Till 1790 it was the capital of the gouvernement of Picardy (q.v.). The famous treaty between Great Britain, France, Spain and Holland which took its name from Amiens was signed in the hotel de ville on the 25th of March 1802. During the war between France and Germany, Amiens, after an important action, fell into the hands of the Prussians on the 28th of November 1870. (See FRANCO-GERMAN WAR.)

See A. de Calonne, Histoire de la ville d'Amiens (1900); John Ruskin, The Bible of Amiens (1881); La Picardie historique et monumentale, tome i., published by the Societe des Antiquaires de Picardie (1893).

AMINES, in chemistry, derivatives of ammonia in which one or more of the hydrogen atoms are replaced by alkyl or aryl groups. The replacement of one hydrogen atom by one alkyl or aryl group gives rise to primary amines; of two hydrogen atoms by two groups, to secondary amines; of three hydrogen atoms by three groups, to tertiary amines. The tertiary amines possess the power of combining with one molecular proportion of an alkyl iodide to form quaternary ammonium salts. The structural relations of these compounds may be shown thus:

NH3; NH2R; NHR2; NR3; Ammonia; primary amine; secondary amine; tertiary amine; NR4I. quaternary ammonium iodide. Aliphatic amines.--These compounds possess properties very similar to those of ammonia, the lowest members of the series being combustible gases readily soluble in water. The next higher members of the series are liquids of low boiling point also readily soluble in water, the solubility and volatility, however, decreasing with the increasing carbon content of the molecule, until the highest members of the series are odourless solids of high boiling point and are insoluble in water. They are all strong bases, readily forming salts with the mineral acids and double salts with the chlorides of gold, platinum and mercury. They are ionized in aqueous solution to a much greater extent than ammonia, the quaternary ammonium bases being the most ionized, and the secondary bases being more strongly ionized than the primary or tertiary bases. For data concerning the conductivity of the organic bases see G. Bredig (Zeit. fur phys. Chem., 1894, 13, p. 289).

Many methods have been devised for the preparation of the amines, the first amine having been isolated in 1849 by A. Wurtz on boiling methyl isocyanate with caustic potash, CON.CH3 + 2KHO = CH3NH2 + K2CO3. The primary amines may also be prepared by heating the alkyl iodides with ammonia (A. W. Hofmann); by the reduction of nitriles with alcohol and sodium (A. Ladenburg, Ber., 1886, 19, p. 783); by heating the esters of nitric acid with alcoholic ammonia at 100 deg. C. (O. Wallach, Ber., 1881, 14, p. 421); by the action of reducing agents on nitroparaffins; by the action of zinc and hydrochloric acid on aldehyde ammonias (German Patent 73,812); by the reduction of the phenylhydrazones and oximes of aldehydes and ketones with sodium amalgam in the presence of alcohol and sodium acetate (J. Tafel, Ber., 1886, 19, p. 1925; 1889, 22, p. 1854; H. Goldschmidt, Ber., 1886, 19, p. 3232); by the action of dilute hydrochloric acid on the isonitriles, R.NC + 2H2O = R.NH2 + H2CO2; by heating the mustard oils with a mineral acid, by the hydrolysis of the alkyl phthalimides (S. Gabriel, Ber., 1887, 20, p. 2224; 1891, 24, p. 3104),

CO CO
/ \ RI / \ 2H2O
C6H4 NK ---> C6H4 NR -------->
\ / \ /
CO CO

COOH
/
C6H4 + NH2R;
\
COOH

by distilling the amino-acids with baryta; by the action of bromine and caustic potash on the acid-amides (A. W. Hofmann, Ber., 1885, 18, p. 2734; 1886, 19, p. 1822);

CH3CONH2 --> CH3CONHBr --> CH3CONKBr -->

CH3NCO --> CH3NH2;

and by the hydrolysis of substituted urethanes (Th. Curtius, Ber., 1894, 27, p. 779; 1896, 29, p. 1166),

N2H4.H20 HONO
R.COOH --> R.COOR1 ------------------> R.CONH.NH2 ----->
acid ester hydrazide

C2H5OH HCI
R.CON3 -------------> R.NH.CO2C2H5 ----> R.NH2
azide urethane

The secondary amines are prepared, together with the primary and tertiary, by the action of ammonia on the alkyl iodides (see below), or by the hydrolysis of para-nitroso derivatives of tertiary aromatic amines, such as para-nitrosodimethylaniline, thus: NO.C6H4.N(CH3)2 + H2O = NO.C6H4.OH + NH(CH3)2. By the action of ammonia on the alkyl iodides a complex mixture of primary, secondary and tertiary amines, along with a quaternary ammonium salt, is obtained, the separation of which is difficult. The method worked out by A. W. Hofmann is as follows:--the mixture is distilled with caustic potash, when the primary, secondary and tertiary amines distil over, and the quaternary ammonium salt remains behind unaffected. The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (CO2C2H5)2 + 2NH2R = (CO.NHR)2 + 2C2H5OH; (CO2C2H5)2 + NHR2 = C2H5O2C.CONR2 + C2H5OH. The tertiary amine is then distilled off, the residual products separated by filtration and finally hydrolysed by a caustic alkali.

The primary, secondary and tertiary amines may be readily distinguished by their behaviour with various reagents. Primary amines when heated with alcoholic potash and chloroform yield isonitriles, which are readily detected by their offensive smell. The secondary and tertiary amines do not give this reaction. With nitrous acid, the primary amines yield alcohols, the secondary amines yield nitrosamines and the tertiary amines do not react: R.NH2 + ONOH = R.OH + N2 + H2O; R2NH + ONOH = R2N.NO + H2O. With benzene sulphochloride in the presence of alkali, the primary amines yield compounds of the type C6H5SO2NHR, soluble in alkalies, whilst the secondary amines yield compounds of the type C6H5SO2NR2, insoluble in alkalies (O. Hinsberg, Ber., 1890, 23, p. 2963). Primary amines heated with carbon bisulphide in alcoholic solution are converted into mustard oils, when the dithiocarbamate first produced is heated with a solution of mercuric chloride.

Methylamine, CH3NH2, occurs in Mercurialis perennis, in bone-oil, and herring brine. It is also a decomposition product of many alkaloids. At ordinary temperatures it is a gas, but may be condensed to a liquid which boils at -6 deg. C. It has a strong ammoniacal smell, burns readily and is exceedingly soluble in water. Its critical temperature is 155 deg. C. and critical pressure 72 atmos. (C. Vincent, J. Chappuis, Jahresb., 1886, p. 202). Dimethylamine, (CH3)2NH, is found in Peruvian guano. It is a heavy vapour which condenses at 7 deg. C. to a liquid, having a pronounced fish-like smell. Trimethylamine, (CH3)3N, is very similar to dimethylamine, and condenses to a liquid which boils at 3.2-3.8 deg. C. It is usually obtained from "vinasses," the residue obtained from the distillation of beet sugar alcohol, and is used in the manufacture of potassium bicarbonate by the Solvay process, since its hydrochloride is much more soluble than potassium carbonate. Tetramethylammonium iodide, N(CH3)4I, is the chief product obtained by the action of methyl iodide on ammonia (Hofmann). It crystallizes in quadratic prisms and has a bitter taste. By warming its aqueous solution with an excess of silver oxide it is converted into tetramethylammonium hydroxide, N(CH3)4OH, which crystallizes in hygroscopic needles, and has a very alkaline reaction. It forms many crystalline salts and absorbs carbon dioxide. It precipitates many metallic hydroxides. On dry distillation it is resolved into trimethylamine and methyl alcohol. If the nitrogen atom in the quaternary ammonium salts be in combination with four different groups, then the molecule is asymmetrical, and the salt can be resolved into optically active enantiamorphous isomerides. W. J. Pope (Jour. Chem. Soc., 1901, 79, p. 828) has resolved benzyl-allyl-phenyl-methylamine iodide by boiling with silver d-camphorsulphonate in a nearly anhydrous mixture of acetone and ethyl acetate. The silver iodide is separated and the solvent distilled off. The residue crystallizes slowly, and the crystalline product is almost wholly d-benzyl-ally-phenyl- ammonium-d-sulphonate, the corresponding l-compound remaining as a syrupy residue. The corresponding iodides are obtained by the addition of potassium iodide to solutions of the sulphonates, and are optically active antipodes.

Diamines.--The diamines contain two amino groups and bear the same relation to the glycols that the primary monamines bear to the primary alcohols. They are of importance, since the higher homologues are identical in many cases with the ptomaines produced by the putrefactive action of some bacteria on albumen and other related substances. Ethylene diamine, C2H4(NH2)2, may be prepared by heating ethylene dibromide with alcoholic ammonia to 100 deg. C. (F. S. Cloez, Jahresb., 1853, p. 468); or by the action of tin and hydrochloric acid on cyanogen (T. Fairley, Ann. Suppl., 3, 1864, p. 372). It is an alkaline liquid, which when anhydrous boils at 116.5 deg. C. Nitrous acid converts it into ethylene oxide. It combines directly with many metallic salts. (See S. F. Jorgensen, Jour. pr. Chem., 1889 (2), 39, p. 8.) Trimethylene diamine, NH2.(CH2)3.NH2, is prepared by the action of ammonia on trimethylene bromide (E. Fischer, Ber., 1884, 17, p. 1799). It is a liquid which boils at 135-136 deg. C., and is readily soluble in alcohol, ether, chloroform and benzene. Tetramethylene diamine (putrescine), NH2.(CH2)4.NH2, is prepared by reducing ethylene dicyanide (succinonitrile) with sodium in absolute alcoholic solution (A. Ladenburg, Ber., 1886, 19, p. 780). It melts at 27 deg. C., and is easily soluble in water. Pentamethylene diamine (cadaverine), NH2.(CH2)5.NH2,is prepared by reducing trimethylene cyanide in ether solution by zinc and hydrochloric acid (A. Ladenburg, Ber., 1883, 16, p. 1151). J. v. Braun (Ber., 1904, 37, p. 3583) has prepared pentamethylene derivatives from piperidine by the action of phosphorus pentachloride. On heating piperidine with phosphorus pentachloride to 200 deg. C. in a sealed tube pentamethylene dichloride is obtained, and this on treatment with potassium phthalimide gives a condensation product of composition, C6H4[CO]2N(CH2)5N[CO]2C6H4, which is finally hydrolysed by hydrochloric acid. Cadaverine is a syrup at ordinary temperatures, and boils at 178-179 deg. C. It is readily soluble in water and alcohol, but only slightly soluble in ether.

Aromatic Amines.--The aromatic amines in some respects resemble the aliphatic amines, since they form salts with acids, and double salts with platinum chloride, and they also distil without decomposition. On the other hand, they are much weaker bases than the aliphatic amines, their salts undergoing hydrolytic dissociation in aqueous solution. The primary aromatic amines may be prepared by the reduction of the nitro-hydrocarbons, the reducing agents used being either alcoholic-ammonium sulphide (N. Zinin), zinc and hydrochloric acid (A. W. Hofmann), an alcoholic solution of stannous chloride (containing hydrochloric acid) (R. Anschutz, Ber., 1886, 19, p. 2161), tin and hydrochloric acid, or, on the manufacturing scale, iron and hydrochloric acid. They may also be obtained by the reduction of nitroso compounds and of hydrazo compounds and of hydrazones (J. Tafel, Ber., 1886, 19, p. 1924), by distilling the amido-acids with lime, by heating phenols with zinc chloride ammonia (V. Merz, Ber., 1880, 13, p. 1298), and by heating the secondary and tertiary bases with concentrated hydrochloric acid to about 180 deg. C.

At a temperature of about 300-400 deg. C. the alkyl chloride formed in this reaction attacks the benzene nucleus and replaces hydrogen by an alkyl group or groups, forming primary amines homologous with the original amine; thus methylaniline hydrochloride is converted into para- and ortho-toluidine hydrochloride, and trimethyl phenyl ammonium iodide is converted into mesidine hydriodide. It is to be noted that only traces of the aromatic amines are produced by heating the halogen substituted benzenes with ammonia, unless the amino group be situated in the side chain, as in the case of benzylamine.

The primary amines are colourless liquids or crystalline solids, which are insoluble in water, but readily soluble in the common organic solvents. When heated with alkyl or aryl iodides, they are converted into secondary and tertiary amines. Concentrated nitric acid attacks them violently, producing various oxidation products, but if the amino group be "protected" by being previously acetylated, then nitro derivatives are obtained. When heated with concentrated sulphuric acid for some time, they are sulphonated. They form condensation products with aldehydes, benzaldehyde and aniline forming benzylidene aniline, C6H5N: CHC6H5, and when heated with acids they form anilides. They give the isonitrile reaction (see above) when warmed with chloroform and a caustic alkali, and form alkyl thioureas when heated with an alcoholic solution of carbon bisulphide. When warmed with a solution of nitrous acid, they are converted into phenols; if, however, nitrous acid be added to an ice-cold solution of a primary amine in excess of mineral acid, a diazonium salt is formed (see AZO COMPOUNDS and DIAZO COMPOUNDS), or in absence of excess of acid, a diazoamine is produced.

The secondary amines may be of two types--namely, the purely aromatic amines, and the mixed secondary amines, which contain an aromatic residue and an alkyl group. The purely aromatic amines result upon heating the primary amines with their hydrochlorides, and, in some cases, by heating a phenol with a primary amine and anhydrous zinc chloride. The mixed secondary amines are prepared by the action of alkyl iodides on the primary amines, or by heating salts of the primary amine with alcohols under pressure. The mixed secondary amines have basic properties, but the purely aromatic secondary amines are only very feeble bases. Both classes readily exchange the imide hydrogen for acid radicals, and give nitrosamines with nitrous acid. The secondary amines do not give the isonitrile reaction.

The tertiary amines may also be of two types, the purely aromatic and the mixed type. The mixed tertiary amines are produced by the action of alkyl halides on the primary amines. The simplest aromatic tertiary amine, triphenylamine, is prepared by the action of brombenzene on sodium diphenylamine (C. Heydrich, Ber., 1885, 18, p. 2156). The simplest aromatic monamine is aniline (q.v.), and the simplest mixed amines are mono- and di-methyl aniline. These substances are treated in the article ANILINE.

The aromatic amine resembling the aliphatic amines is benzylamine, C6H5.CH2.NH2, which may be prepared by reducing benzonitrile in alcoholic solution by means of zinc and acetic acid (O. Mendius, Ann. 1862, 121, p. 144), or by metallic sodium (E. Bamberger, Ber., 1887, 20, p. 1709). It can also be obtained by the action of ammonia on benzyl chloride (S. Cannizzaro, Ann., 1865, 134, p. 128), but di- and tri-benzylamines are simultaneously formed. It is a liquid, which boils at 183 deg. C., and is miscible in all proportions with water, alcohol and ether. It is basic in character, and has a strongly alkaline reaction. Diphenylamine, (C6H5)2NH, is the simplest representative of the true aromatic secondary amines. It is prepared by heating aniline and aniline hydrochloride for some hours to 210-240 deg. C, (Ch. Girard and G. de Laire, Zeit. fur Chem., 1866, p. 438). It crystallizes in white plates, which melt at 45 deg. C. and boil at 302 deg. C. It is almost insoluble in water, but readily volatilizes in steam. When heated with monobasic saturated acids and zinc chloride it yields acridines.

Aromatic Diamines.--The diamines are prepared by reducing the nitranilines or the dinitrohydrocarbons. They crystallize in plates, and for the most part distil without decomposition. Orthophenylene diamine, C6H4(NH2)2, crystallizes from water in plates, which melt at 102-103 deg. C. and boil at 256-258 deg. C. When heated with 10% hydrochloric acid to 180 deg. C. it yields pyrocatechin (Jacob Meyer, Ber., 1897, 30, p. 2569). The orthodiamines are characterized by the large number of condensation products they form. (See IMIDAZOLES, QUINOXALINES, &c.). Metaphenylene diamine crystallizes in rhombic plates which melt at 63 deg. C. and boil at 287 deg. C. It is easily soluble in water and alcohol. When heated with 10% hydrochloric acid to 180 deg. C. it yields resorcin (J. Meyer). Paraphenylene diamine may be prepared as above, and also by the reduction of amidoazobenzene. It crystallizes in tables which melt at 140 deg. C. and boil at 267 deg. C. When heated with 10% hydrochloric acid to 180 deg. C. it yields hydroquinone (J. Meyer). Manganese dioxide and dilute sulphuric acid oxidize it to quinone. The three classes of diamines may be distinguished by their behaviour towards nitrous acid. The ortho-compounds condense to azimido benzenes, the metacompounds yield azo-dyestuffs, and the para- compounds yield bis-diazo compounds of the type XN2.C6H4.N2X.

AMIOT, JEAN JOSEPH MARIE (1718-1793), French Jesuit missionary, was born at Toulon in February 1718. He entered the Society of Jesus in 1737 and was sent in 1750 as a missionary to China. He soon won the confidence of the emperor Kien-lung and spent the remainder of his life at Pekin, where he died on the 9th of October 1793. Amiot was eminently fitted to make good use of the advantages which his situation afforded, and his works did more than had ever been done before to make known to the Western world the thought and life of the Far East. His Dictionnaire tatare-mantchou-francais (Paris, 1789) was a work of great value, the language having been previously quite unknown in Europe. His other writings are to be found chiefly in the Memoires concernant l'histoire, les sciences et les arts de Chinois (15 vols., Paris, 1776-1791). The Vie de Confucius, the twelfth volume of that collection, is complete and accurate.

For full bibliography see De Backer and C. Sommervogel, Bibliotheque de la Cie. de Jesus, i. 294-303; for his works on Chinese music see F. J. Fetis, Biog. univers. des musiciens (Brussels, 1837-1844).

AMIR, or AMEER (an Arabic word meaning "commander," from the root amr, "commanding"), a title common in the Mahommedan East. The form emir is also commonly employed in English. The word originally signified a military commander, but very early came to be extended to anyone bearing rule, Mahomet himself being styled by the pagan Arabs amir of Mecca. Thus the term gradually came to be applied to any high office-bearer, or to any lord or chief. The caliph has the style of Amir ul Omara, "lord of lords." The title Amir ul Muminim, or "commander of the faithful," now borne by the sultan of Turkey, was first assumed by Abu Bekr, and was taken by most of the various dynasties which claimed the caliphate, including the Fatimites, the Spanish Omayyads and the Almohades. The Almoravides and the Merinides assumed the style of Amir ul Muslimin, "commander of the Mussulmans."

The use of the word is, in fact, closely akin to that of the English "lord," sometimes connoting office, as in Amir ul-ahghal (minister of finance) under the Almohades (cf. "lord of the treasury"), sometimes mere dignity, as in the case of the title of honour borne by all descendants of the Prophet, or of the title Mir assumed by men of great rank in the Far East. Sometimes it implies a temporary office of dignity and command--e.g. the Amir ul-haj, "commander of the pilgrimage" (to Mecca). Sometimes again it connotes the meaning of "sovereign lord," in which sense it was early assumed by the princes of Sind and by the rulers of Afghanistan and Bokhara, the title implying a lesser dignity than that of sultan. Thus too it is very generally applied in the East to the chiefs of independent or semi-independent tribes. In the Lebanon both the Christian clans and the Druses are ruled by hereditary amirs. Finally the word (confused not unnaturally with the particle usually attached to it) was borrowed by the West, and is the origin of the English "admiral."

AMIS ET AMILES, the title of an old French romance based on a widespread legend of friendship and sacrifice. In its earlier and simpler form it is the story of two friends, one of whom, Amis, was smitten with leprosy because he had committed perjury to save his friend. A vision informed him that he could only be cured by bathing in the blood of Amiles's children. When Amiles learnt this he killed the children, who were, however, miraculously restored to life after the cure of Amis. The tale was probably of Oriental origin, and introduced to the West by way of Byzantium. It found its way into French literature through the medium of Latin, as the names Amicus and Amellus indicate, and was eventually attached to the Carolingian cycle in the 12th-century chanson de geste of Amis et Amiles. This poem is written in decasyllabic assonanced verse, each stanza being terminated by a short line. It belongs to the heroic period of French epic, containing some passages of great beauty, notably the episode of the slaying of the children, and maintains a high level of poetry throughout. Amis has married Lubras and become count of Blaives (Blaye), while Amiles has become seneschal at the court of Charlemagne, and is seduced by the emperor's daughter, Bellisant. The lovers are betrayed, and Amiles is unable to find the necessary supporters to enable him to clear himself by the ordeal of single combat, and fears, moreover, to fight in a false cause. He is granted a reprieve, and goes in search of Amis, who engages to personate him in the combat. He thus saves his friend, but in so doing perjures himself. Then follows the leprosy of Amis, and, after a lapse of years, his discovery of Amiles and cure. There are obvious reminiscences in this story of Damon and Pythias, and of the classical instances of sacrifice at the divine command. The legend of Amis and Amiles occurs in many forms with slight variations, the names and positions of the friends being sometimes reversed. The crown of martyrdom was not lacking, for Amis and Amiles were slain by Ogier the Dane at Novara on their way home from a pilgrimage to the Holy Land. Jourdain de Blaives, a chanson de geste which partly reproduces the story of Apollonius of Tyre, was attached to the geste of Amis by making Jourdain his grandson.

The versions of Amis and Amiles include--(a) numerous Latin recensions in prose and verse, notably that given by Vincent de Beauvais in his Speculum historiale (lib. xxiii. cap. 162-166 and 169); (b) an Anglo-Norman version in short rhymed couplets, which is not attached to the Charlemagne legend and agrees fairly closely with the English Amis and Amiloun (Midland dialect, 13th century); these with the old Norse version are printed by E. Kolbing, Altengl. Bibl. vol. ii. (1889), and the English romance also in H. Weber, Metrical Romances, vol. ii. (1810); (c) the 12th- century French chanson de geste analysed by P. Paris in Hist. litt. de la France (vol. xxii.), and edited by K. Hofmann (Erlangen, 1882) with the addition of Jourdain de Blaives; (d) the Latin Vita Sanct. Amici et Amelii (pr. by Kolbing, op. cit.) and its Old-French translation, Li amitiez de Ami et Amile, ed. L. Moland and C. d'Hericault in Nouvelles ... du xiiie siecle (Paris, 1856); (e) a 14th-century drama, Un Miracle de Notre Dame d'Amis et Amile, ed. L. J. N. Monmerque and F. Michelin Theatre fr. au moyen age (1839); (f) old Norse, Icelandic, Danish versions, &c. (see K. Hofmann, op. cit.); (g) an imitation which under the name of Oliver and Artus was current in many languages and was the subject of Hans Sachs's comedy, Die treuen Gesellen (1556); (h) Engelhart und Engeltrut, by the minnesinger Conrad von Wurzburg (ed. M. Haupt, Leipzig, 1844, 2nd ed., 1900); (i) the late prose romances, with many changes and additions, Milles et Amys, printed by A. Verard (Paris, c. 1503), &c., for which see G. Brunet, Manuel du libraire, s.v. "Milles." A different version of the legend is inserted at considerable length in L'Ystoire des sept sages (ed. G. Paris, Soc. des anc. textes fr., 1876), in which the friends are called Alexandre and Louis, and Bellisant Florentine. For a further bibliography see L. Gautier, Bibl. des chansons de geste (Paris, 1897). William Morris's version of the French romance was printed at the Kelmscott Press in 1894. See also the essay by W. Pater in The Renaissance, 1893.

AMITERNUM, an ancient town of the Sabines, situated about 5 m. N. of Aquila, in the broad valley of the Aternus, from which, according to Varro, it took its name. It was stormed by the Romans in 293 B.C., and though it suffered from the wars of the Republican period, it seems to have risen to renewed prosperity under the empire. This it owed largely to its position. It lay at the point of junction of four roads--the via Caecilia, the Via Claudia Nova and two branches of the Via Salaria, which joined it at the 64th and 89th miles respectively. The fertility of its territory was also praised by ancient authors. There are considerable remains of an aqueduct, an amphitheatre and a theatre (the latter excavated in 1880--see Notizie degli scavi, 1880, 290, 350, 379), all of which belong to the imperial period, while in the hill on which the village of S. Vittorino is built are some Christian catacombs. Amiternum was the birthplace of the historian Sallust. In a gorge 1 1/2 m. east are massive remains of cyclopean walls (i.e. in rough blocks), probably intended to regulate the flow of the stream (N. Persichetti in Romische Mitteilungen, 1902, 134 seq..)

AMLWCH (llwch = "lake"), a market town of Anglesey, North Wales, situated on slightly rising ground on the N. coast of the island, 15 m. N.W. of Beaumaris and 262 m. from London, by the London & North-Western railway. Pop. of urban district (1901) 2994. Originally it owed its whole importance to the copper mines of the Parys (probably, Parry's) mountain, as, before ore was discovered in March 1768, it was a small hamlet of fishermen. The mines once produced 3000 tons of metal annually, copper smelting being largely carried on, but have now almost ceased working. Though apparently not mentioned by Ptolemy, they were perhaps Roman. Robert Parys, chamberlain of North Wales under Henry IV., is often given as their godfather. The poor harbour called the "port," protected by a breakwater, has been cut out of the rock (shingle). Amlwch is the terminus of the branch railway from Gaerwen to Amlwch, formerly the Anglesey Central Railway Company. Porthllechog, or Bull Bay (so called from the Bull Rock), at a mile's distance, is a small but favourite watering-place. Beyond, on the coast, some 3 m. distant, are the remains of a British fort and of the Llanllaianau monastery, opposite the Middle Mouse islet and close to Llanbadrig old church and Cemmaes. Industries include slate quarrying, shipbuilding, iron and brass foundries, alum, vitriol, manure, guano and tobacco works. At Llanllaianau was found, in 1841, a stone coffin, holding a well- preserved skeleton of 7 1/2 ft. in length. The coffin was apparently of Aberdovey (Aberdyfi) limestone, much corroded. At Llangefni, not far from Amlwch, in 1829, and at Llangristiolus, 3 m. distant from Llangefni, about 1770, were found human bones of a high antiquity, between Glan Hwfa and Fron, and at Capel, respectively. The town has an old Anglican church (St Eleth's).

AMMAN, JOHANN CONRAD (1669-c. 1730), Swiss physician, was born at Schaffhausen in 1669. After graduating at Basel in 1687 he began to practise at Amsterdam, where he gained a great reputation. He was one of the earliest writers on the instruction of the deaf and dumb, and first called attention to his method in his Surdus loquens (Amsterdam, 1692), which was often reprinted, and was reproduced by John Wallis in the Philosophical Transactions (1698). His process consisted principally in exciting the attention of his pupils to the motions of his lips and larynx while he spoke, and then inducing them to imitate these movements, till he brought them to repeat distinctly letters, syllables and words. The edition of Caelius Aurelianus, which was undertaken by the Wetsteins in 1709, was superintended by Amman. He died about 1730 at Warmoud, near Leiden.

AMMAN, JOST (1539-1591), Swiss artist, celebrated chiefly for his engravings on wood, was born at Zurich. Of his personal history little is known beyond the fact that he removed in 1560 to Nuremberg, where he continued to reside until his death in March 1591. His productiveness was very remarkable, as may be gathered from the statement of one of his pupils, that the drawings he made during a period of four years would have filled a hay wagon. A large number of his original drawings are contained in the Berlin collection of engravings. The genuineness of not a few of the specimens to be seen elsewhere is at least questionable. A series of copperplate engravings by Amman of the kings of France, with short biographies, appeared at Frankfort in 1576. He also executed many of the woodcut illustrations for the Bible published at Frankfort by Sigismund Feierabend. Another serial work, the Panoplia Omnium Liberalium Mechanicarum et Sedentariarum Artium Genera Continens, containing 115 plates, is of great value. Amman's drawing is correct and spirited, and his delineation of the details of costume, &c., is minute and accurate. He executed too much, however, to permit of his reaching the highest style of art. Paintings in oil and on glass are attributed to him, but no specimen of these is known to exist.

AMMAN, PAUL (1634-1691), German physician and botanist, was born at Breslau in 1634. In 1662 he received the degree of doctor of physic from the university of Leipzig, and in 1664 was admitted a member of the society Naturae Curiosorum, under the name of Dryander. Shortly afterwards he was chosen extraordinary professor of medicine in the above-mentioned university; and in 1674 he was promoted to the botanical chair, which he again in 1682 exchanged for the physiological. He died at Leipzig in 1691. He seems to have been a man of critical mind and extensive learning. His principal works were: Medicina Critica (1670); Paraenesis ad Docentes occupata circa Institutionum Medicarum Emendationem (1673); Irenicum Numae Pompilii cum Hippocrate (1689); Supellex Botanica (1675); and Character Naturalis Plantarum (1676).

AMMANATI, BARTOLOMEO (1511-1592), Florentine architect and sculptor. He studied under Bandinelli and Jacopo Sansovino, and closely imitated the style of Michelangelo. He was more distinguished in architecture than in sculpture. He designed many buildings in Rome, Lucca and Florence, an addition to the Pitti Palace in the last- named city being one of his most celebrated works. He was also employed in 1569 to build the beautiful bridge over the Arno, known as Ponte della Trinita--one of his celebrated works. The three arches are elliptic, and though very light and elegant, have resisted the fury of the river, which has swept away several other bridges at different times. Another of his most important works was the fountain for the Piazza della Signoria. In 1550 Ammanati married Laura Battiferri, an elegant poet and an accomplished woman.