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CHESTNUT (nux Castanea)

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Originally appearing in Volume V06, Page 113 of the 1911 Encyclopedia Britannica.
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CHESTNUT (nux Castanea) , the See also:common name given to two sorts of trees and their See also:fruit, (1) the so-called " See also:horse-chestnut," and (2) the sweet or " See also:Spanish " chestnut. (1) The common horse-chestnut, Aesculus Hippocastanum (Ger. Rosskastanie; Fr. marronnier d' Inde), has been stated to be a native of See also:Tibet, and to have been brought thence to See also:England in 155o; it is now, however, thought to be indigenous in the mountains of See also:northern See also:Greece, where it occurs See also:wild at 3000 to 4000 ft. above See also:sea-level. Matthiolus, who attributes the origin of the name of the See also:tree to the use of the nuts by the inhabitants of See also:Constantinople for the See also:relief of See also:short-windedness and cough in horses, remarks that no See also:ancient writer appears to have made mention of the horse-chestnut. Clusius (Rariorum plantarum Kist. i. p. 8, 16o1) describes it as a See also:vegetable curiosity, of which in 1588 he had See also:left in See also:Vienna a living specimen, but of which he had not yet seen either the See also:flowers or See also:recent fruit. The dry fruit, he says, had frequently been brought from Constantinople into See also:Europe. The tree grows rapidly; it flourishes best in a sandy, somewhat moist See also:loam, and attains a height of 5o to 6o or more ft., assuming a pyramidal outline. Its boughs are strong and spreading. The buds, conspicuous for their See also:size, are protected by a coat of a glutinous substance, which is impervious to See also:water; in See also:spring this melts, and the bud-scales are then See also:cast off. The leaves are composed of seven radiating leaflets (See also:long-See also:wedge-shaped); when See also:young they are downy and drooping. From the See also:early date of its leafing See also:year by year, a horse-chestnut in the Tuileries is known as the " Marronnier du 20 See also:mars." The flowers of the horse-chestnut, which are See also:white dashed with red and yellow, appear in May, and sometimes, but quite exceptionally, again in autumn; they See also:form a handsome erect panicle, but comparatively few of them afford mature fruit.

The fruit is ripe in or shortly before the first See also:

week in See also:October, when it falls to the ground, and the three-valved thorny See also:capsule divides, disclosing the See also:brown and at first beautifully glossy seeds, the so-called nuts, having a resemblance to sweet chestnuts, and commonly three or else two in number. For See also:propagation of the tree, the seeds may be sown either when fresh, or, if preserved in See also:sand or See also:earth, in spring. Drying by exposure to the See also:air for a See also:month has been found to prevent their germination. Rooks are wont to remove the nutsfrom the tree just before they fall, and to disperse them in various directions. The tree is rarely planted in mixed plantations where profit is an See also:object; it interferes with its neighbours and occupies too much See also:room. It is generally introduced near See also:mansion-houses for See also:ornament and shade, and the celebrated avenues at See also:Richmond and Bushey See also:Park in England are See also:objects of See also:great beauty at the See also:time of flowering. The bark of the horse-chestnut contains a greenish oil, See also:resin, a yellow See also:body, a See also:tannin, C26H24O12, existing likewise in the seeds and various parts of the tree, and decomposable into phloroglucin and aesciglyoxalic See also:acid, C7H603, also aesculetin See also:hydrate, and the crystalline fluorescent See also:compound aesculin, of the formulaC21H,4013 (Rochleder and See also:Schwarz), with which occurs a similar substance fraxin, the paviin of See also:Sir G. G. See also:Stokes (Q. J. Chem. See also:Soc. xi.

17, 1859; xii. 126, 186o), who suggests that its presence may perhaps See also:

account for the discrepancies in the analyses of aesculin given by different authors. From the seeds have been obtained See also:starch (about 14%), See also:gum, See also:mucilage, a non-drying oil, phosphoric acid, salts of See also:calcium, saponin, by boiling which with dilute hydrochloric or sulphuric acid aesculic acid is obtained, quercitrin, See also:present also in the fully See also:developed leaves, aescigenin, C12H26O2, and aesculetin, C9H6O4, which is procurable also, but in small quantity only, from the bark. See also:Friedrich Rochleder has described as constituent principles of the cotyledons aphrodaescin, C52H32O23, a See also:bitter See also:glucoside, argyraescin, C27H42O12, aescinic acid, C24H40O12, and queraescitrin, C41H46025, found also in the leaves. To prepare pure starch from the seeds, Flandin (See also:Comet. rend. See also:xxvii. 391, 1848; See also:xxviii. 138, 1849) recommends kneading them, when peeled and bruised, in an aqueous See also:solution of Alf to 6 of their See also:weight of See also:sodium carbonate. E. Staffel (See also:Ann. d. Chem. u. Pharm. lxxvi., 185o, p. 379) after drying found, in spring and autumn respectively, 10.9 and 3.38% of ash in the See also:wood, 8.68 and 6.57 in the bark, and 7.68 and 7.52 in the leaves of the horse-chestnut.

The ash of the unripe fruit contains 58.77, that of the ripe See also:

kernel 61.74, and that of the See also:green See also:shell 75'91% of potash (E. See also:Wolff). The wood of the horse-chestnut is soft, and serves only for the making of water-pipes, for See also:turner's See also:work and common See also:carpentry, as a source of See also:charcoal for See also:gunpowder, and as See also:fuel. Newly cut it weighs 6o lb, and dry 35 lb per cub. ft. approximately. The bark has been employed for See also:dyeing yellow and for tanning, and was formerly in popular repute as a febrifuge and tonic. The See also:powder of the dried nuts was at one time prescribed as a sternutatory (to encourage See also:sneezing) in the See also:Edinburgh See also:Pharmacopoeia. It is stated to form with See also:alum-water a size or See also:cement highly offensive to See also:vermin, and with two parts of wheaten See also:flour the material for a strong bookbinder's See also:paste. Infusion of horse-chestnuts is found to expel See also:worms from See also:soil, and soon to kill them if they are left in it. The nuts furthermore have been applied to the manufacture of an oil for burning, cosmetic preparations and starch, and in See also:Switzerland, See also:France and See also:Ireland, when rasped on ground, to the See also:bleaching of See also:flax, See also:hemp, See also:silk and See also:wool. In See also:Geneva horse-chestnuts are largely consumed by grazing stock, a single See also:sheep receiving 2 lb. crushed See also:morning and evening. Given to cows in moderate quantity, they have been found to enhance both the yield and flavour of See also:milk. See also:Deer readily eat them, and, after a preliminary steeping in See also:lime-water, pigs also.

For poultry they should be used boiled, and mixed with other nourishment. The fallen leaves are relished by sheep and deer, and afford a See also:

good See also:litter for flocks and herds. One variety of the horse-chestnut has variegated leaves, and another See also:double flowers. See also:Darwin observed that Ae. See also:Pavia, the red buckeye of See also:North See also:America., shows a See also:special tendency, under unfavourable conditions, to be double-blossomed. The seeds of this See also:species are used to stupefy See also:fish. The See also:scarlet-flowered horse-chestnut, Ae. rubicunda, is a handsome tree, less in height and having a rounder See also:head than the common form; it is a native of North America. Another species, possessing flowers with the See also:lower petals white with a red tinge, and the upper yellow and red with a white border, and fruit unarmed, is Ae. indica, a native of the western Himalayas. Among the North See also:American species are the. foetid or See also:Ohio buckeye, Ae. glabra, and Ae. ftava, the sweet buckeye. Ae. californica, when full-grown and in See also:flower, is a beautiful tree, but its leaves often fall before midsummer. (2) The Spanish or sweet chestnut, Castanea sativa (natural See also:order, Fagaceae), is a stately and magnificent tree, native of the countries bordering on the Mediterranean, but also ripening its fruit in sheltered situations as far north as See also:Scotland. It lives very long, and attains a large size, spreading its branches widely.

It has large glossy lanceolate leaves with a toothed margin. The flowers, which appear in early summer, are in pendulous, slender yellowish catkins, which See also:

bear a number of staminate flowers with a few pistillate flowers at the See also:base. The staminate contain 8 to 20 stamens which produce an enormous amount of dusty yellow See also:pollen, some of which gets carried by See also:wind to the protruding stigmas of the pistillate flowers. The latter are See also:borne three together, invested by a cupule of four green bracts, which, as the fruit matures, grow to form the tough green prickly envelope surrounding the See also:group of generally three nuts. The largest known chestnut tree is the famous See also:Castagno di See also:cento See also:cavalli, or the chestnut of a See also:hundred horses, on the slopes of See also:Mount See also:Etna, a tree which, when measured about 178o by See also:Count Borch, was found to have a circumference of 190 ft. The See also:timber bears a striking resemblance to that of the See also:oak, which has been mistaken for chestnut; but it may be distinguished by the numerous See also:fine medullary rays. Unlike oak, the wood is more valuable while young than old. When not more than fifty years old it forms durable posts for fences and See also:gates; but at that See also:age it often begins to deteriorate, having See also:ring-shakes and central hollows. In a young See also:state, when the stems are not above 2 in. in See also:diameter at the ground, the chestnut is found to make durable hoops for casks and props for vines; and of a larger size it makes good See also:hop-poles. Chestnuts (the fruit of the tree) are extensively imported into Great See also:Britain, and are eaten roasted or boiled, and mashed or otherwise as a vegetable. In a raw state they have a sweet See also:taste, but are difficult of digestion. The trees are very abundant in the See also:south of Europe, and chestnuts bulk largely in the See also:food resources of the poor in See also:Spain, See also:Italy, Switzerland and See also:Germany.

In Italy the kernels are ground into See also:

meal, and used for thickening soups, and even for See also:bread-making. In North America the fruits of an allied species, C. americana, are eaten both raw and cooked.

End of Article: CHESTNUT (nux Castanea)

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