A practical treatise on urinary and renal diseases : including urinary deposits . d the administration ofdilute nitric acid in a bitter infusion. X.— OF LIME. When urine becomes alkaline from carbonate of ammonia, asmall quantity of carbonate of lime is precipitated in an amor-phous condition with the earthy phosphates. I have only seenit in a crystalline form in human urine when voided as gravelor small calculi: it is said occasionally to occur in globularspheres and cornucopia-like crystals (Bird, Hassall). In thealkaline and viscid urine of the horse, carbonate of lime isfrequentl
A practical treatise on urinary and renal diseases : including urinary deposits . d the administration ofdilute nitric acid in a bitter infusion. X.— OF LIME. When urine becomes alkaline from carbonate of ammonia, asmall quantity of carbonate of lime is precipitated in an amor-phous condition with the earthy phosphates. I have only seenit in a crystalline form in human urine when voided as gravelor small calculi: it is said occasionally to occur in globularspheres and cornucopia-like crystals (Bird, Hassall). In thealkaline and viscid urine of the horse, carbonate of lime isfrequently deposited in the form of minute spheres composedof radiating linear crystals which are striking objects underthe microscope (see Fig. 19). They show a dark cross withpolarized light. The assumption of this globular form is pro-bably connected with the viscidity of the urine. Carbonate of Lime constitutes a variety of urinary calculuswhich is of extreme rarity in the human subject, but much 102 INORGANIC DEPOSITS. more common in the herbivora (see Carbonate of LimeCalculi).. Fig. 19. Spheres and dumb-bells 01 carbonate of lime from the urine of the horse. XL— SULPHURIC ACID AND THE SULPHATES. About thirty grains of sulphuric acid, in combination withalkaline bases, are daily excreted by the kidneys. A part isderived directly from the food, and a part from the oxidationof the sulphur contained in the albuminous compounds. Thesulphates are highly soluble, and they never constitute a spon-taneous urinary deposit. In all febrile states sulphuric acid is increased. Dr. Parkeshas observed a decided increase after the use of liquor increase is also observed after food, and in all conditionsassociated with an intensified metamorphosis of tissue. It has not yet been shown that a knowledge of the quantityof sulphuric acid separated by the kidneys in any particularcase of disease is capable of subserving any practical purpose. XII.—CHLORINE AND THE CHLORIDES. The chlori
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