A practical treatise on urinary and renal diseases : including urinary deposits . he amount of urea is deter-mined by measuring the volume of nitrogen evolved. A solution is prepared by dissolving 100 grammes of solidcaustic soda in 250 c. c. of water and adding 25 c. c. of bro-mine. The apparatus constructed by Dr. Russell and Mr. West io8 UREA. for the performance of the analysis is both compact andcheap.* But it is not so convenient and accurate to workwith as that devised by Mr. Apjohn. Mr. ApJohns apparatusconsists of:— 1. A glass measuring tube of about a foot in length drawnout at the e
A practical treatise on urinary and renal diseases : including urinary deposits . he amount of urea is deter-mined by measuring the volume of nitrogen evolved. A solution is prepared by dissolving 100 grammes of solidcaustic soda in 250 c. c. of water and adding 25 c. c. of bro-mine. The apparatus constructed by Dr. Russell and Mr. West io8 UREA. for the performance of the analysis is both compact andcheap.* But it is not so convenient and accurate to workwith as that devised by Mr. Apjohn. Mr. ApJohns apparatusconsists of:— 1. A glass measuring tube of about a foot in length drawnout at the end which will be uppermost when the tube isused, like a Mohrs burette, and subdivided into 30 parts ofequal capacity, the aggregate volume of which is 55 c. c. 2. A small wide-mouthed gas bottle of about 60 c. 3. A short test-tube of about 10 c. c. capacity, and of suchheight that when introduced into the gas bottle it will standwithin it in a slightly inclined position. The following are the arrangements for combining the appa-ratus and working an experiment:—. Fig. 20. Apjohns apparatus for the estimation of urea with Russell and Wests solution. The graduated tube, held in a clamp attached to a retort-stand, is depressed into a glass cylinder, nearly filled withwater, until the zero mark, which is near the upper end,exactly coincides with the surface of the water. 15 c. c. ofthe hypobromite solution (100 grammes of JSTaHO, 250 c. c. of * It may be had from Cetti, Brooke Street, Holborn, London ; price8s. 6cl. UREA. 109 water, 25 c. c. of bromine) having been poured into the bottle,the test-tube containing the urine is introduced by means of aforceps, care being taken that none of its contents shall spillinto the hypobromite. The flask is now closed with a veryaccurately fitting india-rubber stopper, perforated with a holein which is inserted a short piece of glass tubing open at bothends, and is then connected with the measuring tube by meansof a piece of elas
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Keywords: ., bookcent, bookdecade1870, booksubjecturinalysis, booksubjecturine
