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chrysalis stage may be cited the swallow-tailed butterfly of Europe (Papilio machaon); while to the category of species which hibernate as perfect insects belong many of the Coleoptera (Rhyncophora, Coccinellidae), &c., as well as some Hemiptera, Hymenoptera, Diptera and Lepidoptera (Vanessa io, urticae, &c.). In the case of the social Hymenoptera it is only the fertilized queen wasp out of the nest that survives the frost of winter, all the workers dying with the onset of cold in the autumn; the common hive bees (Apis mellifica), although they retire to the hive, do not hibernate, the numbers and activity of the individuals within the hive being sufficient to keep up the temperature above soporific point. Ants also remain actively at work underground unless the temperature falls several degrees below zero.

This habit of passing the dry season in the hardened mud | instance of species which survive the winter in the pupal or forming the bottom of exhausted pools and rivers is practised by several species of tropical freshwater fishes, belonging principally to the family Siluridae. The members of this group are able to exist and thrive in moist mud, and can even support life for a comparatively long time out of water altogether. The instinct is exhibited by species occurring both in the eastern and western hemispheres, as is shown by its record in the case of species of Callicthys and Loricaria in Guiana and by Clarias lazera in Senegambia. It is also met with, according to Tennent, in a species of climbing perch (Anabas oligolepis) found in Ceylon and belonging to the family Anabantidae, all the species of which are able to live for a certain length of time out of water, and may sometimes be found crawling across land in search of fresh pools. The habit is also common to some species of mud fishes of the order Dipneusti, in which the air bladder' plays the part of lungs. Protopterus, from tropical Africa, for instance, burrows into the mud and remains for nearly half the year coiled up at the bottom in a slightly enlarged chamber. The walls of this are lined with a layer of slime secreted from the fish's skin, and the orifice is closed with a lid the centre of which is perforated and forms an inturned tube by means of which air is conducted to the fish's mouth. The aestivating burrow of the Brazilian mudfish (Lepidosiren) is similar, except that the lid is perforated with several apertures. The Australian mudfish (Ceratodus) is not known to hibernate or aestivate.

In countries where winter frosts arrest the growth of vegetation terrestrial mollusca seek hibernacula beneath stones or fallen tree trunks, in rock crannies, holes in walls, in heaps of dead leaves, in moss or under the soil, and remain quiescent until the coming of spring. Amongst pulmonate gastropods, most species of snails (Helix, Clausilia) close the mouth of the shell at this period with a membranous or calcified plate, the epiphragm. Slugs (Limax, Arion), on the contrary, lie buried in the earth encysted in a coating of slime. Similarly in the tropics members of this group, such as Achatina in tropical Africa and Orthalicus in Brazil, aestivate during the dry season, the epiphragm preserving them against desiccation; and examples of two species of Achatina from east and west Africa exhibited in the Zoological Gardens in London remained concealed in their shells during the winter, although kept in an artificially warmed house, and resumed their activity in the

summer.

Freshwater Pulmonata do not appear to hibernate, such forms as Limnaea and Planorbis having been frequently seen crawling about beneath the ice of frozen ponds. During periods of drought in England, however, they commonly bury themselves in the mud, a habit which is also practised during the dry season in the tropics by species of Prosobranchiate Gastropods belonging to the genera Ampullaria, Melania and others, which lie dormant until the first rains rouse them from their lethargy. Freshwater Pelecypoda (Anodonta, Unio) spend the European winter buried deep in the muddy bottom of ponds and streams. In cold and temperate latitudes a great majority of insects pass the winter in a dormant state, either in the larval, pupal or imaginal (reproductive) stages. In some the state of hibernation is complete in the sense that although the insects may be roused from their lethargy to the extent of movement by spells of warm weather, they do not leave their hibernacula to feed; in others it is incomplete in the sense that the insects emerge to feed, as in the case of the caterpillar of Euprepia fuliginosa, or to take the wing as in the case of the midge Trichocera hiemalis. Others again, like Podura nivalis and Boreus hiemalis, never appear to hibernate, at least in England. The insects which hibernate as larvae belong to those species which pass more than one season in that stage, such as the goat-moth (Cossus ligniperda), cockchafers (Melolontha), stagbeetles (Lucanus) and dragon-flies (Libellula), &c.; and to some species which, although they only live a few months in this immature state, are hatched in the autumn or summer and only reach the final stage of growth in the following spring, like the butterflies of the genus Argynnis (paphia, aglaia, &c.) in England. As an

Spiders, like nearly all insects, hibernate in cold temperate latitudes. Burrowing species like trap-door spiders of the family Ctenizidae and some species of Lycosidae seal the doors of their burrows with silk or close up the orifice with a sheet of that material. Other non-burrowing species, like some species of Clubionidae and Drassidae, lie up in silken cases attached to the underside of stones or of pieces of loose bark, or buried under dead leaves or concealed in the cracks of walls. Other species, on the contrary, pass the winter in an immature state protected from the cold by the silken cocoon spun by the mother for her eggs before she dies in the late autumn, as in the " garden spider" (Aranea diadema). Commonly, however, when the cocoons are later in the making, or the cold weather sets in early, the eggs of this and of allied species do not hatch until the spring; but in either case the young emerge in the warm weather, become adult during the summer and die in the autumn after pairing and oviposition. Some members of this family, nevertheless, like Zilla x-notata, which live in the corners of windows, or in outhouses where the habitat affords a certain degree of protection from the cold, may survive the winter in the adult stage and be roused from lethargy by breaks in the weather and tempted by the warmth to spin new webs. Typical members of the Opiliones or harvest spiders, belonging to the family Phalangiidae, do not hibernate in temperate and more northern latitudes in Europe and America, but perish in the autumn, leaving their eggs buried in the soil to hatch in the succeeding spring. During the early summer, therefore, only immature individuals are found. Other species of this order, belonging to the family Trogulidae, spend the winter in a dormant state under stones or buried in the soil. False scorpions (Pseudoscorpiones) also hibernate in temperate latitudes, passing the cold months, like many spiders, enclosed in silken cases attached to the underside of stones or loosened pieces of bark. Centipedes and millipedes bury themselves in the earth, or lie up in some secluded shelter such as stones or fallen tree trunks afford during the winter; and in the tropics millipedes lie dormant during seasons of drought.

What is true of the dormant condition of arthropod life in the winter of the northern hemisphere is also true in a general way of that of the southern hemisphere at the same season of the year. This is proved-to mention no other cases-by the observations of Darwin on the hibernation of insects and spiders at Montevideo and Bahia Blanca in South America, and by Distant's account of the paucity of insect life in the winter in South Africa; by his discovery under stones of hibernating semi-torpid Coleoptera and Hemiptera at the end of August in the Transvaal, and of the gradual increase in the numbers of individuals and species of insects in that country as the spring advanced and the dry season came to an end.

Amphibians) (1849): W. T. Blanford, Fauna of British India:
BIBLIOGRAPHY.-T. Bell, A History of British Reptiles (and
Mammalia (1889-1891); G. A. Boulenger, Monograph of the
Tailless Batrachians of Europe, edited by the Ray Society;
"Teleostei in Cambridge Natural History, vii. 541-727 (1904);
T. W. Bridge, "Dipneustei" in Cambridge Natural History, vii.
in Cambridge Natural
505-520 (1904); A. H. Cooke, "Molluscs
History, ii. 25-27 (1895): T. A. Coward, P.Z.S. pp. 849-
855 (1906), and pp. 312-324 (1907); C. Darwin, A Naturalist's

n

Voyage Round the World, pp. 97-98 (1907 ed.); W. L. Distant, deanery. When he heard of the appointment of a successor A Naturalist in the Transvaal, ch. iii. (1892); Marshall Hall, he affixed to the cathedral doors a "protestation and claim of "Hibernation, in Todd's Cyclopaedia of Anatomy and Physiology, pp. 764-776 (1839) (Bibliography); Phil. Trans. Roy. Soc. right." After remaining some time in concealment in London, (1832); John Hunter, Observations on parts of the Animal Economy he was sent by Sancroft and the other nonjurors to James II. in (1837); Index Catalogue of the Library of the Surgeon-General's France on matters connected with the continuance of their Office of the U.S. Army, vii. (1902), Bibliography relating to physiology of Hibernation; W. Kirby and W. Spence, An Introduction episcopal succession; upon his return in 1694 he was himself to Entomology, ed. 17, pp. 517-533 (1856); L. Landois, A Text-book consecrated suffragan bishop of Thetford. His later years were of Human Physiology, translated by W. Stirling, i. 410 (1904); largely occupied in controversies and in writing, while in 1713 he V. Laporte," Suspension of Vitality in Animals," Pop. Sci. Monthly, persuaded two Scottish bishops, James Gadderar and Archibald xxxvi. 257-259 (New York, 1889-1890); Mangili," Essai sur la léthargie périodique,” Annales du Muséum, x. 453-456 (1807); Hawes and Nathaniel Spinckes as bishops among the nonjurors. Campbell, to assist him in consecrating Jeremy Collier, Samuel Hart Merriam, North American Pocket Mice (Washington; He died on the 15th of December 1715. 1889); W. Miller, "Hibernation and Allied States in Animals," Trans. Pan-Amer. Med. Congr. (1893), pt. ii. pp. 1274-1285 (Washington, 1895); M. S. Pembrey and A. G. Pitts, "The Relation between the Internal Temperature and the Respiratory Movements of Hibernating Animals," Journ. Physiol. (London, 1899), pp. 305316; Prunelle," Recherches sur les phénomènes et sur les causes du sommeil hivernal," Annales du Muséum, xviii.; J. A. Saissy, Recherches sur les animaux hivernans (1808); L. Spallanzani, Mémoires sur la respiration (1803); J. Emerson Tennent, Sketches of the Natural History of Ceylon, pp. 351-358 (1861); Volkov, "Le Sommeil hivernal chez les paysans russes," Bull. Mem. Soc. Anthropol. (Paris, 1900), i. 67; abstract in Bril. Med. Journ. (1900), i. 1554. (R. 1. P.)

HIBERNIA, in ancient geography, one of the names by which Ireland was known to Greek and Roman writers. Other names were Ierne, Iuverna, Iberio. All these are adaptations of a stem from which also Erin is descended. The island was well known to the Romans through the reports of traders, so far at least as its coasts. But it never became part of the Roman empire. Agricola (about A.D. 80) planned its conquest, which he judged an easy task, but the Roman government vetoed the enterprise. During the Roman occupation of Britain, Irish pirates seem to have been an intermittent nuisance, and Irish emigrants may have settled occasionally in Wales; the best attested emigration is that of the Scots into Caledonia. It was only in post-Roman days that Roman civilization, brought perhaps by Christian

missionaries like Patrick, entered the island.

HICKERINGILL (or HICKHORNGILL), EDMUND (1631-1708), English divine, lived an eventful life in the days of the Commonwealth and the Restoration. After graduating at Caius College, Cambridge, where he was junior fellow in 1651-1652, he joined Lilburne's regiment as chaplain, and afterwards served in the ranks in Scotland and in the Swedish service, ultimately becoming a captain in Fleetwood's regiment. He then lived for a time in Jamaica, of which he published an account in 1661. In the same year he was ordained by Robert Sanderson, bishop of Lincoln, having already passed through such shades of belief as are connoted by the terms Baptist, Quaker and Deist. From 1662 until his death in 1708 he was vicar of All Saints', Colchester. He was a vigorous pamphleteer, and came into collision with Henry Compton, bishop of London, to whom he had to pay heavy damages for slander in 1682. He made a public recantation in 1684, was excluded from his living in 1685-1688, and ended his career by being convicted for forgery in 1707.

HICKES, GEORGE (1642-1715), English divine and scholar, was born at Newsham near Thirsk, Yorkshire, on the 20th of June 1642. In 1659 he entered St John's College, Oxford, whence after the Restoration he removed to Magdalen College and then to Magdalen Hall. In 1664 he was elected fellow of Lincoln College, and in the following year proceeded M.A. In 1673 he graduated in divinity, and in 1675 he was appointed rector of St Ebbe's, Oxford. In 1676, as private chaplain, he accompanied the duke of Lauderdale, the royal commissioner, to Scotland, and shortly afterwards received the degree of D.D. from St Andrews. In 1680 he became vicar of All Hallows, Barking, London; and after having been made chaplain to the king in 1681, he was in 1683 promoted to the deanery of Worcester. He opposed both James II.'s declaration of indulgence and Monmouth's rising, and he tried in vain to save from death his nonconformist brother John Hickes (1633-1685), one of the Sedgemoor refugees harboured by Alice Lisle. At the revolution of 1688, having declined to take the oath of allegiance, Hickes was first suspended and afterwards deprived of his

The chief writings of Hickes are the Institutiones Grammaticae Anglo-Saxonicae et Moeso-Gothicae (1689), and Linguarum veterum Septentrionalium Thesaurus grammatico-criticus et archaeologicus (1703-1705), a work of great learning and industry.

Apart from these two works Hickes was a voluminous and laborious author. His earliest writings, which were anonymous, were suggested by contemporary events in Scotland that gave him great satisfaction—the execution of James Mitchell on a charge of having attempted to murder Archbishop Sharp, and that of John Kid and John King, Presbyterian ministers," for high treason and rebellion (Ravillac Redivivus, 1678; The Spirit of Popery speaking out of the Mouths of Phanatical Protestants, 1680). In his Jovian (an answer that the Roman empire was not hereditary, and that the Christians to S. Johnson's Julian the Apostate, 1683), he endeavoured to show under Julian had recognized the duty of passive obedience. His two treatises, one of the Christian Priesthood and the other of the Dignity of the Episcopal Order, originally published in 1707, have been more than once reprinted, and form three volumes of the published Collections of Controversial Letters, in 1711 a collection of Library of Anglo-Catholic Theology (1847). In 1705 and 1710 were Sermons, and in 1726 a volume of Posthumous Discourses. Other treatises, such as the Apologetical Vindication of the Church of England, are to be met with in Edmund Gibson's Preservative against Popery. There is a manuscript in the Bodleian Library which sketches his life to the year 1689, and many of his letters are extant in various collections. A posthumous publication of his The Constitution of the Catholick Church and the Nature and Consequences of Schism (1716) gave rise to the celebrated Bangorian controversy. See the article by the Rev. W. D. Macray in the Dictionary of National Biographý, vol. xxvi. (1891); and J. H. Overton, The Nonjurors (1902).

HICKOK, LAURENS PERSEUS (1798-1888), American philosopher and divine, was born at Bethel, Connecticut, on the 29th of December 1798. He took his degree at Union College in 1820. Until 1836 he was occupied in active pastoral work, and was then appointed professor of theology at the Western Reserve College, Ohio, and later (1844-1852) at the Auburn (N.Y.) Theological Seminary. From this post he was elected vice-president of Union College and professor of mental and moral science. In 1866 he succeeded Dr E. Nott as president, but in July 1868 retired to Amherst, Massachusetts, where he devoted himself to writing and study. A collected edition of his principal works was published at Boston in 1875. He died at Amherst on the 7th of May 1888. He wrote Rational Psychology (1848), System of Moral Science (1853), Empirical Psychology (1854), Rational Cosmology (1858), Creator and Creation, or the Knowledge in the Reason of God and His Work (1872), Humanity Immortal (1872), Logic of Reason (1874).

HICKORY, a shortened form of the American Indian name pohickery. Hickory trees are natives of North America, and belong to the genus Carya. They are closely allied to the walnuts (Juglans), the chief or at least one very obvious difference being that, whilst in Carya the husk which covers the shell of the nut separates into four valves, in Juglans it consists of but one piece, which bursts irregularly. The timber is both strong and heavy, and remarkable for its extreme elasticity, but it decays rapidly when exposed to heat and moisture, and is peculiarly subject to the attacks of worms. It is very extensively employed in manufacturing musket stocks, axle-trees, screws, rake teeth, the bows of yokes, the wooden rings used on the rigging of vessels, chair-backs, axe-handles, whip-handles and other purposes requiring great strength and elasticity. Its principal use in America is for hoop-making; and it is the only American wood found perfectly fit for that purpose.

The wood of the hickory is of great value as fuel, on account of the brilliancy with which it burns and the ardent heat which it

gives out, the charcoal being heavy, compact and long-lived. | which come from the Western States, are from 1 in. to 1 in. long, The species which furnish the best wood are Carya alba (shellbark hickory), C. tomentosa (mockernut), C. olivaeformis (pecan or pacane nut), and C. porcina (pig-nut), that of the last named, on account of its extreme tenacity, being preferred for axle-trees

FIG. 1.-Shell-bark Hickory (Carya alba) in flower.

and axle-handles. The wood of C. alba splits very easily and is very elastic, so that it is much used for making whip-handles and baskets. The wood of this species is also used in the neighbourhood of New York and Philadelphia for making the back bows of Windsor chairs. The timber of C. amara and C. aquatica is considered of inferior quality.

Most of the hickories form fine-looking noble trees of from 60 to 90 ft. in height, with straight, symmetrical trunks, well-balanced ample heads, and bold, handsome, pinnated foliage. When confined in the forest they shoot up 50 to 60 ft. without branches, but when standing alone they expand into a fine head, and produce a lofty round-headed pyramid of foliage. They have all the qualities necessary to constitute fine graceful park trees. The most ornamental of the species are C. olivaeformis, C. alba and C. porcina, the last two also producing delicious nuts, and being worthy of cultivation for their fruit alone.

The husk of the hickory nut, as already stated, breaks up into four equal valves or separates into four equal portions in the upper part, while the nut itself is tolerably even on the surface, but has four or more blunt angles in its transverse outline. The

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smooth, cylindrical, pointed at the ends and thin-shelled, with the kernels full, not like those of most of the hickories divided by partitions, and of delicate and agreeable flavour. The thickshelled fruits of the pig-nut are generally left on the ground for swine, squirrels, &c., to devour. In C. amara the kernel is so bitter that even squirrels refuse to eat it.

HICKS, ELIAS (1748-1830), American Quaker, was born in Hempstead township, Long Island, on the 19th of March 1748. His parents were Friends, but he took little interest in religion until he was about twenty; soon after that time he gave up the carpenter's trade, to which he had been apprenticed when seventeen, and became a farmer. By 1775 he had "openings leading to the ministry" and was "deeply engaged for the right administration of discipline and order in the church," and in 1779 he first set out on his itinerant preaching tours between Vermont and Maryland. He attacked slavery, even when preaching in Maryland; wrote Observations on the Slavery of the Africans and their Descendants (1811); and was influential in procuring the passage (in 1817) of the act declaring free after 1827 all negroes born in New York and not freed by the Act of 1799. He died at Jericho, Long Island, on the 27th of February 1830. His preaching was practical rather than doctrinal and he was heartily opposed to any set creed; hence his successful opposi tion at the Baltimore yearly meeting of 1817 to the proposed creed which would make the Society in America approach the position of the English Friends by definite doctrinal statements. His Doctrinal Epistle (1824) stated his position, and a break ensued in 1827-1828, Hicks's followers, who call themselves the "Liberal Branch," being called "Hicksites" by the "Orthodox" party, which they for a time outnumbered. The village of Hicksville, in Nassau County, New York, 15 m. E. of Jamaica, lies in the centre of the Quaker district of Long Island and was named in honour of Elias Hicks.

See A Series of Extemporaneous Discourses... by Elias Hicks (Philadelphia, 1825); The Journal of the Life and Labors of Elias Hicks (Philadelphia, 1828), and his Letters (Philadelphia, 1834).

HICKS, HENRY (1837-1899), British physician and geologist, was born on the 26th of May 1837 at St David's, in Pembrokeshire, where his father, Thomas Hicks, was a surgeon. He studied medicine at Guy's Hospital, London, qualifying as M.R.C.S. in 1862. Returning to his native place he commenced a practice which he continued until 1871, when he removed to Hendon. He then devoted special attention to mental diseases, took the degree of M.D. at St Andrews in 1878, and continued his medical work until the close of his life. In Wales he had been attracted to geology by J. W. Salter (then palaeontologist to the Geological Survey), and his leisure time was given to the study of the older rocks and fossils of South Wales. In conjunction with Salter, he established in 1865 the Menevian group (Middle Cambrian) characterized by the trilobite Paradoxides. Subsequently Hicks contributed a series of important papers on the Cambrian and Lower Silurian rocks, and figured and described many new species of fossils. Later he worked at the Pre-Cambrian rocks of St David's, describing the Dimetian (granitoid rock) and the Pebidian (volcanic series), and his views, though contested, have been generally accepted. At Hendon Dr Hicks gave much attention to the local geology and also to the Pleistocene deposits of the Denbighshire caves. For a few years before his death he had laboured at the Devonian rocks. With his keen eye for fossils he detected organic remains in the Morte slates, previously regarded as unfossiliferous, and these he regarded as including representa

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FIG. 2.-1, Fruit of Carya alba; 2, Hickory Nut; 3, Cross Section tives of Lower Devonian and Silurian. His papers were mostly of Nut; 4, Vertical Section of the Seed.

hickory nuts of the American markets are the produce of C. alba, called the shell-bark hickory because of the roughness of its bark, which becomes loosened from the trunk in long scales bending outwards at the extremities and adhering only by the middle. The nuts are much esteemed in all parts of the States, and are exported in considerable quantities to Europe. The pecan-nuts,

published in the Geol. Mag. and Quart. Journ. Geol. Soc. He was elected F.R.S. in 1885, and president of the Geological Society of London 1896-1898. He died at Hendon on the 18th of November 1899.

HICKS, WILLIAM (1830-1883), British soldier, entered the Bombay army in 1849, and served through the Indian mutiny, being mentioned in despatches for good conduct at the action of Sitka Ghaut in 1859. In 1861 he became captain, and in the

Abyssinian expedition of 1867-68 was a brigade major, being again mentioned in despatches and given a brevet majority. He retired with the honorary rank of colonel in 1880. After the close of the Egyptian war of 1882, he entered the khedive's service and was made a pasha. Early in 1883 he went to Khartum as chief of the staff of the army there, then commanded by Suliman Niazi Pasha. Camp was formed at Omdurman and a new force of some 8000 fighting men collected-mostly recruited from the fellahin of Arabi's disbanded troops, sent in chains from Egypt. After a month's vigorous drilling Hicks led 5000 of his men against an equal force of dervishes in Sennar, whom he defeated, and cleared the country between the towns of Sennar and Khartum of rebels. Relieved of the fear of an immediate attack by the mahdists the Egyptian officials at Khartum intrigued against Hicks, who in July tendered his resignation. This resulted in the dismissal of Suliman Niazi and the appointment of Hicks as commander-in-chief of an expeditionary force to Kordofan with orders to crush the mahdi, who in January 1883 had captured El Obeid, the capital of that province. Hicks, aware of the worthlessness of his force for the purpose contemplated, stated his opinion that it would be best to "wait for Kordofan to settle itself " (telegram of the 5th of August). The Egyptian ministry, however, did not then believe in the power of the mahdi, and the expedition started from Khartum on the 9th of September. It was made up of 7000 infantry, 1000 cavalry and 2000 camp followers and included thirteen Europeans. On the 20th the force left the Nile at Duem and struck inland across the almost waterless wastes of Kordofan for Obeid. On the 5th of November the army, misled by treacherous guides and thirst-stricken, was ambuscaded in dense forest at Kashgil, 30 m. south of Obeid. With the exception of some 300 men the whole force was killed. According to the story of Hicks's cook, one of the survivors, the general was the last officer to fall, pierced by the spear of the khalifa Mahommed Sherif. After emptying his revolver the pasha kept his assailants at bay for some time with his sword, a body of Baggara who fled before him being known afterwards as "Baggar Hicks" (the cows driven by Hicks), a play on the words baggara and baggar, the former being the herdsmen and the latter the cows. Hicks's head was cut off and taken to the mahdi.

See Mahdiism and the Egyptian Sudan, book iv., by Sir F. R. Wingate (London, 1891), and With Hicks Pasha in the Soudan, by J. Colborne (London, 1884). Also EGYPT: Military Operations.

HIDALGO, an inland state of Mexico, bounded N. by San Luis Potosi and Vera Cruz, E.by Vera Cruz and Puebla,S.by Tlaxcala and Mexico (state), and W. by Querétaro. Pop. (1895) 551,817, (1900) 605,051. Area, 8917 sq. m. The northern and eastern parts are elevated and mountainous, culminating in the Cerro de Navajas (10,528 ft.). A considerable area of this region on the eastern side of the state is arid and semibarren, being part of the elevated tableland of Apam where the maguey (American aloe) has been grown for centuries. The southern and western parts of the state consist of rolling plains, in the midst of which is the large lake of Metztitlan. Hidalgo produces cereals in the more elevated districts, sugar, maguey, coffee, beans, cotton and tobacco. Maguey is cultivated for the production of pulque, the national drink. The chief industry, however, is mining, the mineral districts of Pachuca, El Chico, Real del Monte, San José del Oro, and Zimapán being among the richest in Mexico. The mineral products include silver, gold, mercury, copper, iron, lead, zinc, antimony, manganese and plumbago, Coal, marble and opals are also found. Railway facilities are afforded by a branch of the Vera Cruz and Mexico line, which runs from Ometusco to Pachuca, the capital of the state, and by the Mexican Central. Among the principal towns are Tulancingo (pop. 9037), a rich mining centre 24 m. E. of Pachuca, Ixmiquilpán (about 9000) with silver mines 80 m. N. by W. of the Federal Capital, and Actópan (2666), the chief town of the district N.N.W. of Pachuca, inhabited principally by Indians of the Othomies nation.

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HIDALGO (a Spanish word, contracted from hijo d'algo or hijo de algo, son of something, or somewhat), originally a Spanish title of the lower nobility; the hidalgo being the lowest grade of nobility which was entitled to use the prefix "don." The term is now used generally to denote one of gentle birth. The Portuguese fidalgo has a similar history and meaning. HIDALGO Y COSTILLA, MIGUEL (1753-1811), Mexican patriot, was born on the 8th of May 1753, on a farm at Corralejos, near Guanajuato. His mother's maiden name was Gallaga, but contrary to the usual custom of the Spaniards he used only the surname of his father, Cristobal Hidalgo y Costilla. He was educated at Valladolid in Mexico, and was ordained priest in 1779. Until 1809 he was known only as a man of pious life who exerted himself to introduce various forms of industry, including the cultivation of silk, among his parishioners at Dolores. But Napoleon's invasion of Spain in 1808 caused a widespread commotion. The colonists were indisposed to accept a French ruler and showed great zeal in proclaiming Ferdinand VII. as king. The societies they formed for their professedly loyal purpose were regarded, however, by the Spanish authorities with suspicion as being designed to prepare the independence of Mexico. Hidalgo and several of his friends, among whom was Miguel Dominguez, mayor of Querétaro, engaged in consultation and preparations which the authorities considered treasonable. Dominguez was arrested, but Hidalgo was warned in time. He collected some hundred of his parishioners, and on the 16th of September 1810 they seized the prison at Dolores. This action began what was in fact a revolt against the Spanish and Creole elements of the population. With what is known as the "grito" or cry of Dolores as their rallying shout, a multitude gathered round Hidalgo, who took for his banner a wonder-working picture of the Virgin belonging to a popular shrine. At first he met with some success. A regiment of dragoons of the militia joined him, and some small posts were stormed. The whole tumultuous host moved on the city of Mexico. But here the Spaniards and Creoles were concentrated. Hidalgo lost heart and retreated. Many of his followers deserted; and on the march to Querétaro he was attacked at Aculco by General Felix Calleja on the 7th of November 1810, and routed. He endeavoured to continue the struggle, and did succeed in collecting a mob estimated at 100,000 about Guadalajara. With this ill-armed and undisciplined crowd he took up a position on the bridge of Calderon on the river Santiago. On the 17th of January 1811 he was completely beaten by Calleja and a small force of soldiers. Hidalgo was deposed by the other leaders, and soon afterwards all of them were betrayed to the Spaniards. They were tried at Chihuahua, and condemned. Hidalgo was first degraded from the priesthood and then shot as a rebel, on the 31st of July or the 1st of August 1811.

See H. H. Bancroft, The Pacific States, vol. vii., which contains a copious bibliography.

HIDDENITE, a green transparent variety of spodumene, (q.v.) used as a gem-stone. It was discovered by William E. Hidden (b 1853) about 1879 at Stonypoint, Alexander county, North Caro lina, and was at first taken for diopside. In 1881 J. Lawrence Smith proved it to be spodumene, and named it. Hiddenite occurs in small slender monoclinic crystals of prismatic habit, often pitted on the surface. A well-marked prismatic cleavage renders the mineral rather difficult to cut. Its colour passes from an emerald green to a greenish-yellow, and is often unevenly The mineral is dichroic in a distributed through the stone. marked degree, and shows much "fire" when properly cut. The composition of the mineral is represented by the formula. LiAl(SiO3)2, the green colour being probably due to the presence of a small proportion of chromium. The presence of lithia in this green mineral suggested the inappropriate name of lithia emerald, by which it is sometimes known. Hiddenite was originally found as loose crystals in the soil, but was afterwards worked in a veinstone, where it occurred in association with beryl, quartz, garnet, micą, rutile, &c.

HIDE1 (Lat. hida, A.-S. higid, híd or hiwisc, members of a household), a measure of land. The word was in general use in England in Anglo-Saxon and early English times, although its meaning seems to have varied somewhat from time to time. Among its Latin equivalents are terra unius familiae, terra unius cassati and mansio; the first of these forms is used by Bede, who, like all early writers, gives to it no definite area. In its earliest form the hide was the typical holding of the typical family. Gradually, this typical holding came to be regarded as containing 120 acres "(not 120 acres of 4840 sq. yds. each, but 120 times the amount of land which a ploughteam of eight oxen could plough in a single day). This definition appears to have been very general in England before the Norman Conquest, and in Domesday Book 30, 40, 50 and 80 acres are repeatedly mentioned as fractions of a hide. Some historians, however, have thought that the hide only contained 30 acres or thereabouts.

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"The question about the hide," says Professor Maitland in Domesday Book and Beyond," is pre-judicial' to all the great questions of early English history." The main argument employed by J. M. Kemble (The Saxons in England) in favour of the "small hide is that the number of hides stated to have existed in the various parts of England gives an acreage far in excess of the total acreage of these parts, making due allowance for pasture and for woodland, an allowance necessary because the hide was only that part of the land which came under the plough, and each hide must have carried with it a certain amount of pasture. Two illustrations in support of Kemble's theory must suffice. Bede says the Isle of Wight contained 1200 hides. Now 1200 hides of 120 acres each gives a total acreage of 144,000 acres, while the total acreage of the island to-day is only 93,000 acres. Again a document called The Tribal Hidage puts the number of hides in the whole of England at nearly a quarter of a million. This gives in acres a figure about equal to the total acreage of England at the present time, but it leaves no room for pasture and for the great proportion of land which was still woodland. On these grounds Kemble regarded the hide as containing 30 or 33, certainly not more than 40 acres, and thought that each acre contained about 4000 sq. yds., i.e. that it was roughly equal to the modern acre. Another argument brought forward is that 30 or 40 acres was enough land for the support of the average family, in other words that it was the terra unius familiae of Bede. Another Domesday student, R. W. Eyton, puts down the hide at 48 acres. But formidable arguments have been advanced against the "small" hide. There is no doubt that at the time of Domesday the hide was equated with 120 and not with 30 acres. Then, taking the word familia in its proper sense, a household with many dependent members, and making an allowance for primitive methods of agriculture, it is questionable whether 30 or 40 acres were sufficient for its support; and again if the equation 1 hide=120 acres is rejected there is no serious evidence in favour of any other. A possible explanation is that, although in early Anglo-Saxon times the hide consisted of 30 acres or thereabouts, it had come before the time of Domesday to contain 120 acres. But no trace of such change can be found; there is no break in the continuity of the landcharters which refer to hides and manses. Reviewing the whole question Professor Maitland accepts the view that the hide contained The difficulties are serious but they are not insuperable. Bede, writing in a primitive age and speaking for the most part of lands far away from Northumbria, uses figures in a vague and general fashion; then the hide of 120 acres does not mean 120 times 4840 yds., it means much less; and lastly at the time of Domesday the hide was not a unit of measurement, it was a unit for pur poses of taxation. On the other hand, Mr. H. M. Chadwick (Studies on Anglo-Saxon Institutions) says there is no evidence that the hide contained 120 acres before the 10th century. He suggests that possibly the size of the hide in Mercia may have been fixed at 40 acres, while in Wessex it was regarded as containing 120 acres. Dr Stubbs (Const. Hist. i.) suggests that the confusion may have arisen because the word was used "to express the whole share of one man in all the fields of the village." Thus it might refer to 30 acres, his share in one field, or to 120 acres, his share in the four helds. He adds, however, that this explanation is not adequate for all cases. But these differences about the size of the hide are not peculiar to modern times. Henry of Huntingdon says, Hida Anglice vocatur terra unius aratri culturae sufficiens per annum, while the

120 acres.

The homonym "hide," meaning to conceal, is in O. Eng. hydan; the word appears in various forms in Old Teutonic languages. The root is probably seen in Gr. Kee to hide, or may be the same as in "hide," skin, O. Eng. hýd, which is also seen in Ger. Haut, Dutch huid; the root appears in Lat. cutis, Gr. KUTOS. The Indo-European root ku-, weakened form of sku-, seen in "sky," and meaning to cover, may be the ultimate source of both words. The slang use of Ito hide," to flog or whip, means to take the skin off, to flay."

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Dialogus de scaccario puts its size at 100 acres, though this may be the long hundred, or 120. Perhaps, therefore, Selden is wisest when a very good description of the early hide when he says (Titles of he says, "hides were of an incertain quantity." Certainly he gives Honour): "Now a hide of land regularly is and was (as I think) as much land as might be well manured with one plough, together with pasture, meadow and wood competent for the maintenance of that plough, and the servants of the family." The view that the size of the hide varied from district to district is borne out by Professor Vinogradoff's more recent researches. In his English Society in the Eleventh Century he mentions that there was a hide of 48 acres in Wiltshire and one of 40 acres in Dorset. In addition hides, and in Sussex the hide often contained 8 virgates. Somesome authorities distinguish between English hides and Welsh times again in the 11th century hides were not merely fiscal units; they were shares in the land itself.

The fact that the hide was a unit of assessment, has been established by Mr J. H. Round in his Feudal England, and is regarded as throwing a most valuable light upon the many problems which present themselves to the student of Domesday. The process which converted the hide from a unit of measurement to a unit for assessment purposes is probably as follows. Being in general use to denote a large piece of land, and such pieces of land being roughly equal all over England, the hide was a useful unit on which to levy taxation, a use which dates doubtless from the time of the Danegeld. For some time the two meanings were used side by side, but before the Norman Conquest the hide, a unit for taxation, had quite supplanted the hide, a measure of land, and this was the state of affairs when in 1086 William I. ordered his great inquest to be made. The formula used in Domesday varies from county to county, but a single illustration may be given. Huntedun Burg defendebat se ad geldum regis pro quarta parte de Hyrstingestan hundred pro L. hidis. This does not mean that the town of Huntingdon contained a certain fixed number of square yards multiplied by 50, but that for purposes of taxation Huntingdon was regarded as worth 50 times a certain fiscal unit.

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This view of the nature of the hide was hinted at by R. W. Eyton in A Key to Domesday and was accepted by Maitland. Its proof rests primarily upon the prevalence of the five-hide unit. By collating various documents which formed part of the Domesday inquest Mr Round has brought together for certain parts of England, especially for Cambridgeshire and Bedfordshire, the holdings of the various fords in the different vills, and vill after vill shows a total 5 hides or 10 hides or only a slight discrepancy therefrom. A similar result is shown for the hundreds where multiples of 5 are almost universal, and the total hidage for the county of Worcester is very near the round figure of 1200. This arrangement is obviously artificial; it must have been imposed upon the counties or the hundreds by the central authority and then divided among the vills. Another proof is found in what is called" beneficial hidation." It is shown that in certain cases the number of hides in a hundred has been reduced since the time of Edward the Confessor, and that this reduction had been transferred pro rata to the vills in the hundred. Thus Mr Round concludes that the hide was fixed "independently of area or value." Some slight criticism has been directed against the idea of "artificial hidation," but the most that can be said against it is that its proof rests upon isolated cases, a However, reproach which further research will doubtless remove. Professor Vinogradoff accepts the hide primarily as a fiscal unit reality," and Maitland says the fiscal hide is "at its best a lame "which corresponds only in a very rough way to the agrarian compromise between a unit of area and a unit of value."

What is the origin of the five-hide unit? Various conjectures have been hazarded, and the unit is undoubtedly older than the Danegeld. Rejecting the idea that it is of Roman or of British origin, and pointing to the serious difference in the rates at which the various counties were assessed, Mr Round thinks that it dates from the time when the various Anglo-Saxon kingdoms were independent. Possibly it was the unit of assessment for military service, possibly it was the recognized endowment of a Saxon thegn. In Anglo-Saxon times a man's standing in society was dependent to a great extent upon the number of hides which he possessed; this statement is fully proved from the laws. Moreover, in the laws of the Wessex king, Ine, the value of a man's oath is expressed in hides, the oath for a king's thegn being probably worth 60 hides and that of a ceorl 5 hides.

The usual division of the hide was into virgates, a virgate being, after the Conquest at least, the normal holding of the

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