Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 3, 1802).djvu/59

Rh , and for preserving iron from rust.

The wood of the juniper-tree is of a reddish colour, very hard and durable: it is employed in manquetry and veneering; making cups, cabinets, &c. while the bark may be manufactured into ropes.—The charcoal made from this wood, affords the most durable heat, so that live embers are said to have been found in the ashes, after having been covered for 12 months.—The resin of this plant (gum ), when powdered and rubbed into paper, is frequently used under the name of pounce.—Thrushes and grouse feed on the juniper-berries, and disseminate the seed in their dung.—The sprouts are eaten by horses, sheep, and goats.  IVORY, the tooth or tusk of an elephant, growing on each side of his trunk, and somewhat resembling the shape of a horn.

Ivory is much esteemed for its remarkable whiteness, its polish, and beautiful grain. asserts, that if this substance be boiled with the root of mandragoras, for six hours, it may be rendered soft and flexible. By steeping small pieces of ivory in vinegar, or any other acid, they become ductile, and may be preserved in that state for a considerable time, by keeping them in common water. This hard substance may also be softened and whitened, by immersing it in a hot decoction made of red sage leaves, in double-distilled white-wine vinegar, with the addition of a little quick-lime. For removing spots, the ivory should be laid in unslacked lime, and a small portion of water poured on it, lest the heat be too intense, and the ivory scale, or become brittle. Others discharge the stains by merely steeping it for some time in strong lime-water.

Ivory may be dyed green, either in a solution of copper or verdigrease in aqua-fortis; or by grinding together two parts of verdigrease and one of sal ammoniac, and dissolving them in strong white-wine vinegar. Farther, by employing four ounces of aqua regia, and one ounce of sal ammoniac, a fine purple colour will be the result.

Ivory, bone, horn, and other solid parts of animals, may be stained yellow, by previously boiling them in a solution of one pound of alum in two quarts of water; then immersing them for half an hour in a liquor prepared by boiling half a pound of turmeric in a gallon of water, till it be reduced to three quarts, and afterwards plunging the coloured substance into alum water.—All bony matters may also be stained blue: they are first to be tinged with green, then dipped in a strong and hot solution of pearl ashes.—See also, -, and.

Ivory may be prepared as a ground for miniature-painting, by cleansing the leaves or plates, and rubbing them over with the juice of garlic. This method is preferably recommended for removing its greasy quality, which prevents the colours from fixing on the ground, and is said to be more useful than either soap or ox-gall.

With respect to the medicinal properties of ivory, its shavings, like those of, may, by boiling, be converted into a jelly, and possess similar restorative virtues.  .—See .