A New Supplement...: I. Indian ink. Indian yellow. Indigo. Indigogene. Indigo(t)ic acid. Isatis tinctoria. Ivory black. Japan Blacking.

A New Supplement to the latest Pharmacopoeias of London, Edinburgh, Dublin, and Paris, Forming A Complete Dispendatory, Conspectus, and Dictionary of Medical Chemistry, Giving All the Old and New Names, Including the New French and American Medicines, and Poisons; with Symptoms, Treatment, and Tests; as Well As Herbs, Drugs, Compounds, Veterinary Drugs, With the Pharmacopoia of the Vetenary College, Nostrums, Patent Medicines, Perfumery, Paints, Varnishes, And similar articles kept in the Shops; With Their Compositions, Imitations, Adulterations, And Medicinal Uses, Being a General Book of Formulæ and Recipes For Daily Reference in the Laboratory and at the Counter.
Fourth edition, corrected, improved, and very much enlarged.
By James Rennie, M. A., Editor of the Quarterly Journal of Foreign Medicine; the Pharmacopeia Universalis; Author of a Conspectus of Prescriptions in Medicine, Surgery, and Midwifery; the Pharmacopeia Imperialis, &c. &c.
London: Baldwin and Cradock. 1837.
London: Thomas Curson Hansard, Paternoster Row.

INDIAN INK, or China Ink, from its being originally imported from China, is, when genuine, supposed to be procured from the smoke of resinous trees, but is made in this country of lamp-black from the umbrella-formed shades of oil lamps, beat into a mass with purified glue or isinglass, and scented with musk or amber.
Imitated by charcoal made from cherry-stones or beans, and mixed with gum arabic; or with common lamp black beat up with gum, honey, seed lac, common glue, &c&. Its goodness will appear at once from rubbing it down in a saucer with alittle water, from its breaking splintery, and feeling soft and not gritty when rubbed against the teeth.

INDIAN YELLOW, a pigment of a bright yellow, which is imported in lumps from India. It is frequently adulterated.

INDIGO. P. The fecula of the Indigofera tinctoria. Procured by macerating the leaves, treating the infusion with lime water, and drying the sediment in lumps. The French physician prescribe it in phthisis, diarrhoea, and immoderate flow of the lochia, as and astringent, it has also been prescribed with advantage in epilepsy, but its chief use is in dyeing.
Adulterated, where it is manufactured, with the fecula of other species of Indigofera, which do not produce so fine a tint; and also with the dyed fecula of other plants; but these adulterations can only be detected by trying the deepness and brightness of the tint int solution. When mixedwith earthy matters, as it often is, these will subside from the solution. The best indigo has a coppery tinge of colour.

INDIGOGENE. The basis of Indigo, which is white or deoxidized indigo. (Liebig.)

INDIGOIC, or INDIGOTIC ACID. THe acid of indigo, which has recently been investigated with great care by Dr. Buff. It is said by M. Chevreul to be quite distinct from the carbazotic acid.

ISATIS TINCTORIA. Woad, a native plant, which is sometimes employed by dyers for producing blues. It is supposed to contain indigo.

IVORY BLACK is prepared by burning the shavings or chipsof wood in a closely covered crucible till no smoke is seen to pass through the joinings. The matter, when cooled, is pounded, ground on a porphyry slab with water, washed on a filter with warm water, and dried. It is used in painting, and also as a tooth-powder, and largely in sugar refining. See CARBO ANIMAL. PUR. L.
Adulterated with common bone-black, which may be known by having a tinge of red, instead of a fine clear greyish-black. Bone-black is made in the same way as ivory-black. Other blacks of an inferior kind are also frequently mixed with it.

JAPAN BLACKING. Boil together half a gallon of boiled linseed-oil, an ounce and a half of bitumen, and four ounces of burnt umber. When sufficiently incorporated, add as much oil of turpentine as will make it of a proper thickness, taking care that it does not catch fire.
Or, mix lbss of treacle, 3j of lamp-black, 3v of yeast, aa 3j of sugar-candy, of sweet oil, of gum-dragon, of isinglass, and of ox-gall, with Oij of stale beer. It ought to stand an hour by the fire before using, and be applied with a sponge. Or, mix Oj of spirits of turpentine and 3j of Chio turpentine and asphaltum.

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