On the elimination of nitrogen by the kidneys and intestines during rest and exercise, on a diet without nitrogen / by E. A. Parkes, M.D.

  • Parkes, Edmund A. (Edmund Alexander), 1819-1876.
Date:
[1867]
Catalogue details

Licence: Public Domain Mark

Credit: On the elimination of nitrogen by the kidneys and intestines during rest and exercise, on a diet without nitrogen / by E. A. Parkes, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    S. took about -5 oz. salt and T. about -33, exclusive of salt iu food. Adding the water of the so-called solid food to the water taken as drink, the daily amount of food was, in grnis.— S. T. Water-free solids, iu grms 662*2 6102 Water, in grms 2334-.0 2212-3 Total food ingesta 29967 2822-5 The mean weight of this period was for S. 67'7 kilogs. and for T. 50-6 kilogs. The ingress of solid food per kilog, of body-weight was 9*78 and 12 grms. respectively. The smaller man eat therefore absolutely rather less, but relatively more. During four days of this period the mean daily urinary excretion was, in grms. and cubic centimetres— Quantity. Sp. gr. Urea. Nitrogen in urea. Total -nitrogen by soda- lime. Non- ureal nitrogen. Chloride of sodium s 1226 1028-25 35-001 16-334 17-973 1-639 14-23 T. 1335 1020-6 25-925 12-098 13-409 1-313 11-685 The excretion of nitrogen was fairly constant from day to day, the range of the urea being, in the case of S., from 38-37 to 33-36 grms., or be- tween 2 and 3 grms., above and below the mean amount; and in the case of T. from 27 68 to 24-906, or nearly 1 grm. above and below the mean amount. This shows the daily equality of diet and exercise. Calculated for body-weight, the amount per kilog. is— Urea. Nitrogen Total Non-ureal in urea. nitrogen. nitrogen. s •517 •241 -265 •024 T -512 -239 •266 •026 The veny close relation, indeed identity, as far as the total nitrogen is concerned, of the excretion per kilog. of body-weight in these two men comes out very clearly, and shows that there must be a real connexion between body-weight and urinary excretion. It is remarkable that while the heavier man passed 4^ grms. more nitrogen daily from the kidneys than the smaller man, he did not eat any great excess of food. Unfortunately, as the nitrogen in the food was not perfectly determined, it is impossible to know precisely whether the 52 grms. of excess of solid food taken by the larger man would contain 4^ grms. more nitrogen. As, however, the amount of meat was precisely the
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