. Chemistry: general, medical, and pharmaceutical, including the chemistry of the U. S. Pharmacopia. A manual on the general principles of the science, and their applications in medicine and pharmacy. more distinctly seenafter phosphates have been removed by acetic acid. In certainaspects the smaller crystals look like square plates traversed by across. A dumb-bell form of this deposit is also sometimes seen,resembling certain forms of uric acid and the coalescing spherulesof a much rarer sediment—calcium carbonate. Calcium oxalate isinsoluble in acetic, but soluble in hydrochloric, acid. The
. Chemistry: general, medical, and pharmaceutical, including the chemistry of the U. S. Pharmacopia. A manual on the general principles of the science, and their applications in medicine and pharmacy. more distinctly seenafter phosphates have been removed by acetic acid. In certainaspects the smaller crystals look like square plates traversed by across. A dumb-bell form of this deposit is also sometimes seen,resembling certain forms of uric acid and the coalescing spherulesof a much rarer sediment—calcium carbonate. Calcium oxalate isinsoluble in acetic, but soluble in hydrochloric, acid. The octahedraare frequently met with in the urine of persons who have partakenof garden rhubarb and certain other vegetables. The crystals mayoften be deposited artificially (according to Waddington) by drop-ping a fragment of oxalic acid into several ounces of urine and set-ting aside for a few hours. URINARY SEDIMENTS. 583 Calcium carbonate is rarely found in the urine of man, but fre-quently in that of the horse and other herbivorous animals. Humanurine containing calcium carbonate often reddens litmus-paper, andit is only after the removal, on standing, of the excess of carbonic Fig. 55.
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