Further experiments on the effect of diet and exercise on the elimination of nitrogen / by E.A. Parkes.

  • Parkes, Edmund A. (Edmund Alexander), 1819-1876.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Further experiments on the effect of diet and exercise on the elimination of nitrogen / by E.A. Parkes. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Urinary water, in cub. centims. 8 A.M. 8 P.M. 10 to J. or.ai. 8 P.M. 8 A.M. 676-5 1106-5 660 270 930 ny*(\ rlt^v PPqI. 780 210 990 4th day exercise 415 87 715 140 850 urea, in grammes. 8 A.M. 8 P.M. to to J-OLdl. 8 P.M. 8 A.M. 16-768 8-514 25-282 7-986 4-293 12-079 3-042 3-087 6-123 3-652 2-540 6-192 4-290 3-066 7-356 Nitrogen. Nitrogen by soda-lime. Total in 24 hours. 8 A.M. to 8 P.M. 8 P.M. to 8 A.M. Nitrogen by soda-lime. Nitrogen calculated from urea. 8-287 4-304 12-591 11-798 3-782 2-381 6-163 5-728 1-692 1-396 3-088 2-859 1-764 •9196 2-684 2-889 2*052 i'333 3-383 3'433 The effects of exercise and rest are complicated with the gradually de- creasing elimination dependent on the supply of nitrogen being cut off, consequently nothing can be concluded from the lessening of nitrogen on the 2nd day (exercise). On comparing the 3rd and 4th days (rest and exercise), the nitrogen by soda-lime shows a decrease on the exercise day; but as the ureal nitrogen is almost precisely the same on the two days, it does not seem possible to affirm a decrease. The most positive result is the increase of nitrogen (as shown by both methods) on the 5th day (rest after work). There was a decided excess, amounting to '699 grammes or very nearly 19 per cent. Such an increase occurring on the 5th day after the supply of nitrogen was cut off, seems inexplicable unless on the suppo- sition that it was owing to the previous muscular exertion. I felt, however, that this experiment might be better conducted. The exercise was commenced too soon, and before the nitrogen had reached its