February 12, 1898

Method of Examination of Urine.

JAMA. 1898;XXX(7):387. doi:10.1001/jama.1898.02440590047013

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Omaha, Neb., Feb. 3, 1898.

To the Editor:  —Apropos of the ingenious method for the detection of casts described by Drs. Haines and Skinner in the Journal of January 29, it may be of interest to describe the method which has been in use in my laboratory for the past few months. I depend entirely on the centrifugal method and use only tubes containing at least 15 c.c. Both tubes are filled to the 15 c.c. mark with the freshest possible specimen of urine and centrifugalized at from 1800 to 2500 revolutions per minute for three minutes; then at least 10 c.c. are withdrawn from the tubes with a pipette, being careful not to shake; the tubes are again carefully filled with the pipette and again centrifugalized; this process is repeated ten or twelve times, so that in about half an hour we have the sediment in each tube from

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