. A text-book of human physiology . FiG. 139. Fig. 140. Fig. 139.—Crystals of urea, obtained from liuman urine after long-continued evaporation, after 140.—Crystals of uric acid, after Funke. Some of the forms represented were obtained by solution and recrystallization of chemically pure uric acid; some by treatment of urinary sediments containing urates with mineral acids; some by spontaneous crjstallization from urine. Most of the crystals are tinged with urea. ing composition: C , H , X , S Ba ,0 The quantity of this acid (calc
. A text-book of human physiology . FiG. 139. Fig. 140. Fig. 139.—Crystals of urea, obtained from liuman urine after long-continued evaporation, after 140.—Crystals of uric acid, after Funke. Some of the forms represented were obtained by solution and recrystallization of chemically pure uric acid; some by treatment of urinary sediments containing urates with mineral acids; some by spontaneous crjstallization from urine. Most of the crystals are tinged with urea. ing composition: C , H , X , S Ba ,0 The quantity of this acid (calculated as the Ba salt) excretedin twenty-four hours amounts to not less than 3-4 g. NH- -CO 3. Creatinin, Methvl-glvco-cyanamid, NH:C^ , occurs to the ^ ^ N( extent of about per cent in the urine. The daily output in the urineamounts to g. and may be estimated at 1 g. as a mean value. 4. Ammonia, NH3. The daily quantity amounts to g. = two tofour per cent of the nitrogen in the urine. The ratio of amm
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