On the elimination of nitrogen during rest and exercise on a regulated diet of 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 during rest and exercise on a regulated diet of 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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    increased excretion of nitrogen was, I believe, not at all connected with it. Thus in the first and third periods the nitrogen was almost the same, yet in S. the diiference in the mean amount of water was 266 cub. centims., and in B. was 60 cub. centims. In 8., in the fifth period, the amount of water was the same (within 6 cub. centims.) as in the first period, yet the nitrogen was more than 3 grammes in excess. If indi- vidual days are taken, no obvious relation appears between the urinary water and the nitrogen. The largest amount of water in S. (1760 cub. centims.) corresponded to 19536 nitrogen, while the largest amount of nitrogen (23'488) corresponded to 1430 cub. centims., and the next amount of nitrogen (2125) was passed in only 900 cub. centims. of urine. In B. the largest amount of nitrogen (21597) was contained in the largest amount of water (1610 cub. centims.), but almost as great an amount was contained in 1000 and 920 cub. centims. So that dif- ferences in the amoimt of water cannot explain the variations in the exit of nitrogen. If not owing to alteration in food, nor to variable passage of water through the kidneys, it seems tolerably certain that the condi- tions of rest and exercise were the causes of the variation. Excretion of Nitrogen hy the towels. The two men did not have quite the same amount of intestinal excreta. The average daily weight (sixteen days) in the case of S. was 4-798 ounces avoirdupois or 136 grammes; while in the case of B. they amounted only to 3-97 ounces, or 112*8 grammes. The exact daily weights are given further on, and I will now merely state the amount of nitrogen, which was determined three times. Nitrogen in grammes. S. B. 1*227 1- 486 2- 138 0*644 1-091 1-504 i-6i7 1-079 B. passed (if these three days represent the mean) 0*538 gramme less nitrogen daily by the bowels than S., and during the first twelve days he passed on an average 0-6 gramme more nitrogen in the urine, so that during these twelve days the discharge of nitrogen by the conjoint channels was within 1 gramme the same in the two men; the amounts being in S. 238*848, and in B. 239*757 grammes in twelve days, while the amount of nitrogen passing in (independent of a stnall amount in the tea, cofiee, butter, &c.) was 235*32 grammes. This accordant result proves, I beHeve, both the estimate of the nitrogen in the food and the collection and analysis of the excreta to have been accurate. I was