Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . ility.—Test the solubility of calcium oxalate inthe ordinary solvents (page 4) and in acetic and hydrochloricacids. URINE. -59 NEUTRAL SULPHUR COMPOUNDS. Under this head may be classed such bodies as cystin (seep. 76), chondroitin-sulphuric acid, oxyproteic acid, alloxypro-teic acid, uroferric acid, sulphocyanides and taurin sulphur content of the bodies just enumerated is generallytermed loosely combined or neutral sulphur in order
Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . ility.—Test the solubility of calcium oxalate inthe ordinary solvents (page 4) and in acetic and hydrochloricacids. URINE. -59 NEUTRAL SULPHUR COMPOUNDS. Under this head may be classed such bodies as cystin (seep. 76), chondroitin-sulphuric acid, oxyproteic acid, alloxypro-teic acid, uroferric acid, sulphocyanides and taurin sulphur content of the bodies just enumerated is generallytermed loosely combined or neutral sulphur in order thai it maynot be confused with the acid sulphur which occurs in the in-organic sulphuric acid and ethereal sulphuric acid the neutral sulphur content of normal human urineis 14-20 per cent of the total sulphur content. XII-CH-HN I I ALLANTOIN, 00 00. I I NH-CO XFL Allantoin has been found in the urine of suckling- calves aswell as in that of the dog and cat. It has also been detected inthe urine of infants within the first eight days after birth, aswell as in the urine of adults. It is more abundant in the urine Fig. Allan to in, from Cats and b, Forms in which it crystallized from the urine ; c, re-crystallizedallantoin. (Drawn from micro-photographs furnished by Prof. Lafayette of Yale University.) 260 PHYSIOLOGICAL CHEMISTRY. of women during pregnancy. Allantoin is formed by the oxi-dation of uric acid and the output is increased by thymus orpancreas feeding. When pure it crystallizes in prisms (, p. 259) and when impure in granules and knobs. Patho-logically, it has been found increased in diabetes insipidus andin hysteria with convulsions (Pouchet). Experiments. 1. Separation from the —Mcissners Method.—Precipitate the urine with baryta water. Neutralize the fil-trate carefully with dilute sulphuric acid, filter immediatelyand evaporate the filtrate to incipient crystallization. Com-pletely precipitate this warm f
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