. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. recipitatecharacteristic of neutral rather than of alkaline or feebly acid urine, when heated, becomes turbidfrom precipitated earthy phosphates. This opacity, be-ing easily cleared up by a drop or two of acid, shouldnever be mistaken for coagulated albumen. Calciumphosphate forms a very common variety of urinary cal-culus. Carbonate of calcium is generally amorphous, and onlyseen in crystalline form in human urine when voided asgravel or small calc
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. recipitatecharacteristic of neutral rather than of alkaline or feebly acid urine, when heated, becomes turbidfrom precipitated earthy phosphates. This opacity, be-ing easily cleared up by a drop or two of acid, shouldnever be mistaken for coagulated albumen. Calciumphosphate forms a very common variety of urinary cal-culus. Carbonate of calcium is generally amorphous, and onlyseen in crystalline form in human urine when voided asgravel or small calculi. The granules are readily de-tected by their solubility with effervescence in mineralacids. The Organized Elements found in deposits are bestdetected by the microscope and are, for the most part,fully described in the article on Microscopy (Vol. IV.),to which the reader is referred for fuller details. Urine that contains blood-corpuscles in sufficient quan-tity to form a visible sediment, will always give the reac-tions for albumen and blood-pigment. If the blood isnot coagulated in the urine the corpuscles form a reddish-. Fig. 4282.—1, Fern-leaf crystal of triple phosphate ; 2, common forms of the phosphates in lower left, and neutral phosphate crystals in the upperright side of the field. (Peyer.) brown precipitate which rapidly changes if the urine isalkaline. The appearance of the blood-cells under themicroscope depends on the density and chemical reactionof the urine. They swell up, become globular, and aredifficult to detect in very light urines, but are crenatedand contracted in urines of high specific gravity. In al-kaline urine they are rapidly decolorized, look like hya- 438 REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. line rings, and require a well-regulated light for theiridentification. Urine containing pus has an opaque, milky appearance
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
