. A manual of clinical diagnosis by means of microscopical and chemical methods, for students, hospital physicians, and practitioners . mperature. (V. Jaksch.) MICROSCOPICAL i:\AMlNATION OF THE URINE. 515 every decomposed urine, occurring in the form of small granules,and frequently staining the morphological elements that may hepresent a distinct blue. Sediments presenting a bluish-black colorwere noted in the time of Hippocrates already, and have beendescribed since by numerous observers, but the nature of the color-ing-matter has only been determined within the last fifty ,
. A manual of clinical diagnosis by means of microscopical and chemical methods, for students, hospital physicians, and practitioners . mperature. (V. Jaksch.) MICROSCOPICAL i:\AMlNATION OF THE URINE. 515 every decomposed urine, occurring in the form of small granules,and frequently staining the morphological elements that may hepresent a distinct blue. Sediments presenting a bluish-black colorwere noted in the time of Hippocrates already, and have beendescribed since by numerous observers, but the nature of the color-ing-matter has only been determined within the last fifty , the occurrence of indigo in the urine is of interest, asrenal calculi have been observed which consisted almost entirely ofthis substance. But little is known of the causes which give riseto its appearance in the urine, but there can be no doubt that itsoccurrence is referable to the action of certain micro-organismsupon urinary indican (see page Organized Constituents of Urinary Sediments. Epithelial Cells (Fig. 118).—Bearing in mind the fact thatdesquamative processes are constantly going on in the epithelial Fig. Epithelium from the urinary , Round cells ; b, conical and caudate cells; c, flat cells. lining of the various cavities and channels of the body, one -houldexpect to find in every urine representatives of the different forms 1 v. Jaksch, Prag. nied. Woch., 1892, vol. xvii. p. 602. 516 THE URINE. of epithelium occurring in the urinary organs, from the Malpighiantufts down to the meatus urinarius. To a certain extent this actu-ally happens, and cells apparently derived from the meatus, theurethra, bladder, ureters, and pelvis of the kidneys may be met within almost every specimen, although it may at times be difficult torefer to their origin the individual cells observed. Bizzozero evenclaims that it is impossible to distinguish between the cells ofthe bladder and those of the meatus and renal pelvis, while as aclass they may readily be differ
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