. A practical treatise on medical diagnosis for students and physicians . if5Tfi)ir Einhorns saccharimeter. The Phenylhydrazin Test. Von Jakseh believes this test to be a veryaccurate one. About 2 grains of phenylhydrazin hydrochloride and about:> grains of sodium acetate are put into a test-tube half-full of contents of the tube are heated and the tube filled with the suspectedurine. The tube is kept for fifteen or twenty minutes in boiling water, PLATE XIIL. Crystals of Pheiiyl-glucosazone. (Oc. 4, Obj. D.) Drawn by J. D. Z. Chase. DIABETIC URINE TEST. 647 and then put
. A practical treatise on medical diagnosis for students and physicians . if5Tfi)ir Einhorns saccharimeter. The Phenylhydrazin Test. Von Jakseh believes this test to be a veryaccurate one. About 2 grains of phenylhydrazin hydrochloride and about:> grains of sodium acetate are put into a test-tube half-full of contents of the tube are heated and the tube filled with the suspectedurine. The tube is kept for fifteen or twenty minutes in boiling water, PLATE XIIL. Crystals of Pheiiyl-glucosazone. (Oc. 4, Obj. D.) Drawn by J. D. Z. Chase. DIABETIC URINE TEST. 647 and then put in a vet^sol of cold water. AVIieu ii large amount of sugaris present, a deposit of yellow needle-like crystals is visible to the nakedeve ; but when only a small amount is present, the sediment must beexamined under the microscope. The crystals appear singly, or insheaves and line radii. Yellow plates and brown balls do not indicatesug-ar. (Plate XIII.) Quantitative Estimation of Sugar. Fehlings solution may be used witha burette and measured quantities of urine and reagent. Wormleyrecommends a method which answers very well for office-use : 1 ofFehlings solution is diluted in a large test-tube with 4 of distilledwater, aiid boiled. of the suspected urine is then added from agraduated pipette. Heat is then applied, the precipitate watched, andthen another 0,1 added, and heat again applied. The addition , followed by heat, is contin
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