Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . will form. These may be recognisedb) their microscopical characters. 3. Uric acid may be detected in animal fluids, when mere traces ofthis substance or of urates are present, by a plan proposed by mycolleague, Dr. Garrod. The fluid suspected to contain the urateis treated with a few drops of strong acetic acid (glacial acetic acid isbest) in a watch glass. A few filaments of tow or very thin silk areplaced in the mixture, and the whole set aside under a glass shade, in awarm place, for twenty-four or for
Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . will form. These may be recognisedb) their microscopical characters. 3. Uric acid may be detected in animal fluids, when mere traces ofthis substance or of urates are present, by a plan proposed by mycolleague, Dr. Garrod. The fluid suspected to contain the urateis treated with a few drops of strong acetic acid (glacial acetic acid isbest) in a watch glass. A few filaments of tow or very thin silk areplaced in the mixture, and the whole set aside under a glass shade, in awarm place, for twenty-four or forty-eight hours. Gradually uric acidcrystals separate, and are deposited upon the filaments. Their charac-ters may be recognised by microscopical examination. Some crystals ofuric acid deposited upon a hair in urine are represented in one of theplates in part IV. The quantity of uric acid is estimated by collecting the crystalsseparated by the addition of an acid, and weighing them after theyhave been carefully washed and dried. Dr. Thudichum recommends ILLUSTRATIONS OF O0
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