128 
Proceedings of Royal Society of Edinburgh. [sess. 
possible that a diminished loss of water from the skin and air pas- 
sages may have occurred during these periods. On this subject we 
have no evidence. We do not consider that the variations in the 
exercise taken during these different periods will account for these 
variations in the non-nitrogenous waste, although it is highly probable 
that the large non-nitrogenous waste during the second period was 
associated with the large amount of exercise taken. We are entirely 
at a loss to explain the rise in the non-nitrogenous waste during 
Period V. 
Table II. 
Relation- 
Period. 
Loss in 
Grms. 
Total in 
Period. 
Per 
Diem. 
Per Kilo, 
of Body 
W eight 
per Diem. 
Propor- 
tion of 
Flesh to 
Fat. 
Average 
Exercise 
in Min. 
per Diem. 
ship of 
Water not 
excreted by 
Kidneys to 
Water so 
excreted. 
II. 
Total, 
2749 
549 
9-4 
30th to 3rd, 
Flesh, 
825 
165 
2-8 
1:2-3 
69 
1:1 
inclusive, 
5 days. 
Non-nitro- 
genous, 
j- 1924 
384 
6-6 
III. 
Total, 
1190 
233 
4-3 
4th to 8th, 
Flesh, 
745 
149 
2*7 
1:0-6 
30 
1:3-6 
inclusive, 
5 days. 
Non-nitro- 
genous, 
| 445 
89 
1-6 
IV. 
Total, 
1105 
221 
4-0 
9th to 13th, 
Flesh, 
646 
129 
2*3 
1:0-7 
9 
1:1-8 
inclusive, 
5 days. 
Non-nitro- 
genous, 
| 559 
112 
27 
y. 
Total, 
1475 
295 
5*5 
14th to 18th, 
Flesh, 
630 
126 
2-3 
1 : 1*3 
12 
1:1-9 
inclusive, 
5 days. 
Non-nitro- 
genous, 
| 845 
169 
3'2 
VI. 
Total, 
764 
152 
2-9 
19th to 23rd, 
Flesh, 
491 
98 
1*8 
1:0-5 
"i 
1:1-6 
inclusive, 
5 days. 
Non-nitro- 
genous, 
| 273 
54 
11 
But we may analyse still further these results. 
During the twenty-eight days on which Jacques was under 
observation, he passed 316 grms. of urea, corresponding to about 
1 47 grms. of nitrogen. This represented a waste of flesh amounting 
to 4330 grms., which would contain 500 grms. of carbon. Of this, 
63 grms. were excreted as urea. The remaining 437 must have been 
passed out as carbonic acid. 
