A treatise on Bright's disease and diabetes, with especial reference to pathology and therapeuticsIncluding a section on retinitis in Bright's disease . nctionof the two fluids is carefully watched for the white line of al-bumen. This is best seen by shading the tube by the hand ora pamphlet placed behind and slightly below the line of junc-tion, so that the light may fill obliquely upon it. The gradualdelivery of the urine from the tube is greatly facilitated by ro-tating the latter imder the index finger, especially if the upperend of the tube is a little roughened. This secures such agradua
A treatise on Bright's disease and diabetes, with especial reference to pathology and therapeuticsIncluding a section on retinitis in Bright's disease . nctionof the two fluids is carefully watched for the white line of al-bumen. This is best seen by shading the tube by the hand ora pamphlet placed behind and slightly below the line of junc-tion, so that the light may fill obliquely upon it. The gradualdelivery of the urine from the tube is greatly facilitated by ro-tating the latter imder the index finger, especially if the upperend of the tube is a little roughened. This secures such agradual entrance of the air as permits the urine to descendvery slowly without mixing with the acid below. Precautions.—In urines of high specific gravity, from con-centration of the ordinary constituents, a white band makesits appearance at the l»order between the two fluids, whichis not albumen, but acid urates, resulting from the partialdecomposition of the neutral urates and the preci])itation of I TESTING FOR ALBUMEN. 53 the more insoluble acid salt. But the behavior of the bandthus produced is quite dliferent from that of the albumen. F;g. Testing for albumen by nitric acid. Although sharply defined at first, the lower border stands ata slightly higher level than that of the albumen, while theupper edge soon ceases to be circumscribed and rises upwardinto the urine like a cloud, soon pervading the entire super-natant urine; whereas the albumen remains sharply definedat the line between the two fluids, until, in the course ofseveral hours, if its quantity be small, it may be completelydissolved by the excess of acid present. Further, the cloudof acid urates is promptly dissolved by the application of amoderate heat. If, as sometimes happens in acute fevers, theurine is both concentrated and contains albumen, there maybe two layers, an upper cloudy one of urates, and a lowersharply defined of albumen. But in chronic Brights disease,at least, urine is generally of low spec
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