Gutta Percha, Purified. Dr Cattell, of London, has succeeded in purifying gutta percha so perfectly from all extraneous matter, that it presents the appearance of ivory. The raw material is dissolved in a certain solvent, and the solution most carefully filtered until it leaves on evaporation the gutta percha in a pure milk-white condition.
GYP′SUM. This is native sulphate of lime. When baked, to deprive it of water, and ground, it forms plaster of Paris. Gypsum is an excellent manure for certain soils.
HAARBALSAM, Vegetabilischer—Vegetable Hair Balsam (Joh. Andr. Hauschild, Leipsic). A decoction of burdock root, containing a little spirit and coloured green with indigo. (König.) Hager analysed a turbid brownish fluid, which deposited a brown precipitate on standing, and when filtered consisted of a decoction of burdock root with 20 per cent. of spirit.
Haarbalsam Mailandischer—Mailand’s Hairbalsam (Kreller, Nuremberg). Beef marrow, 40 parts; cinchona extract, 5 parts; balsam of Peru, 1 part; storax, 1 part; oil of bergamot, 1 part; oil of lemons, 1⁄2 part. (Hager.)
Haarbalsam Ostindischer—East Indian Hairbalsam (Dr Ayer). Contains sugar of lead, sulphur, glycerin, oil of lavender, and water.
Haarbalsam (J. F. Sehwarzlose Söhne, Berlin). A brownish-yellow spirituous aromatic fluid, having nearly the composition of eau de Cologne, with liquid storax, carbonate of potash, and a fat—perhaps derived from cantharides. (Hager.)
Haarbalsam (A. Marquart, Leipsic). A mixture of 83 grammes water perfumed with eau de Cologne, with 12 grammes glycerin, 4·25 grammes milk of sulphur, and 1·2 gramme lead nitrate.
HAD′DOCK. A small sea-fish, allied to the cod, and esteemed an excellent article of food. It is the Gadus æglefinus of Linnæus. Split, smoked, and dried, it is common in the smaller shops of London.
HÆMATEM′ESIS. In pathology, vomiting of blood. See Stomach Affections.
HÆM′ATITE. Syn. Hematite. In mineralogy, one of the most important iron ores. Two kinds are distinguished, the red, which is an anhydrous peroxide of iron, and the brown, which is the hydrated peroxide.