For 2 pints, powdered tartaric acid, 280 grains; bicarbonate of soda, 340 grains.
For 3 pints, powdered tartaric acid, 340 grains; bicarbonate of soda, 420 grains.
For 5 pints, tartaric acid, 620 grains; carbonate of soda, 760 grains.
Put the acid and soda in different coloured papers.
GEDACHTNISS-LIMONADE—Mnemonic Lemonade (manufactured by G. M. Raufer, Vienna). A mixture of 15 parts phosphoric acid, 15 parts glycerin, 70 parts water. (Schädler.)
GEHOR INSTRUMENT. Instrument for deafness (Apotheker F. Brunner, Troppau). A little tube of silver plate, 2 centimètres long and as thick as a straw, with a small mussel-shaped widening at one end, which is wrapped in cotton wool, to be inserted in the ear.
GEHOR LIQUOR, Schweizer—Swiss Cure for Deafness (Raudnitz). Water mixed with a little coarse brandy. (Wittstein.)
GEHOROL—Oil for Deafness (C. Brockelmann, Soest). Provence oil adulterated with sunflower oil and mixed with very small traces of camphor and cajeput, sassafras, and rosemary oils. (Hager.)
GEL′ATIN. Syn. Gelatine; Gélatine, Fr.; Gelatina, L. Animal jelly, obtained by the prolonged action of boiling water on the organic tissue of the bones, tendons, and ligaments, the cellular tissue, the skin, and the serous membranes. Glue and size are coarse varieties of gelatin, prepared from hoofs, hides, skins, &c.; and isinglass is a purer kind, obtained from the air bladders of some other membranes of fish.
Prop., &c. Gelatin is insoluble in cold water, but dissolves with greater or less readiness on the application of heat, according to the source where it is obtained, and in this state forms a tremulous and transparent jelly on cooling; it is insoluble in both alcohol and ether, and is decomposed by the strong alkalies and acids; with tannic acid it forms an insoluble compound of a buff colour, which is the basis of leather; when acted on by cold concentrated sulphuric acid, it yields glycocoll or gelatin sugar; and when boiled with strong alkalies, it yields glycocoll and leucine. Chlorine passed into a solution of gelatin occasions a dense white precipitate (chlorite of gelatin), which ultimately forms a tough, elastic, pearly mass, somewhat resembling fibrin.