. Medical diagnosis for the student and practitioner. Fig. 66.—Electric centrifuge. Fig. 67.—Purdys graduated tubesfor the centrifuge. of estimation by boiling the urine in a test-tube, or by judging the amountby the depth of the ring produced by the contact test with nitric acid areuseful, but not sufficiently accurate and introduce too much of the personalequation. On the otherhand, the very exact methods of the chemical labora-tory are laborious, and demand more time than the busy practitioner cangive. * If urates are present in excess the supernatant fluid may be replaced by boiling watera
. Medical diagnosis for the student and practitioner. Fig. 66.—Electric centrifuge. Fig. 67.—Purdys graduated tubesfor the centrifuge. of estimation by boiling the urine in a test-tube, or by judging the amountby the depth of the ring produced by the contact test with nitric acid areuseful, but not sufficiently accurate and introduce too much of the personalequation. On the otherhand, the very exact methods of the chemical labora-tory are laborious, and demand more time than the busy practitioner cangive. * If urates are present in excess the supernatant fluid may be replaced by boiling waterafter centrifugalization and the process continued a short time longer. 222 MEDICAL DIAGNOSIS Roughestimation. Effect ofreaction. Colordeceptive. Smallquantities. A misleadingcolor. E. S. Woods Approximation Method.—The following classification forrough work is based upon the cold nitric acid test performed as follows: Anordinary wine-glass is half filled with urine, inclined until the liquid nearlyoverflows and then underlaid with nitric acid,
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
