PHYSICAL AND CHEMICAL AGENTS UPON BLOOD. 
723 
Gas from pure sheep’s blood, after twenty-four hours’ action with 100 per cent, of 
atmospheric air: — 
No. 69. — In 100 parts of air. 
Oxygen ... 19 2621,^^ 0X yg en 21*08 
Carbonic acid . T818J 
Nitrogen . . . 78-920 
Before treatment the blood contained 0-451 per cent/ of urea; after treatment it con- 
tained 0-435 per cent. 
Gas from sheep’s blood plus tartrate of antimony, twenty-four hours’ action, 100 per 
cent, of atmospheric air : — 
No. 70. — In 100 parts of air. 
Oxygen . . 
Carbonic acid 
Nitrogen . . 
20-411 
2-55J 
Total oxygen 22-96 
77-04 
Before treatment this blood contained 0-451 per cent, of urea; after treatment it 
contained 0-354 per cent. In another portion of this blood, which was treated with 
sulphate of zinc, there remained only 0‘28 per cent, of urea. In a series of experiments 
on the effects of antimony as a slow poison, I invariably found the urine loaded with 
urea, even when the animals were reduced to perfect skeletons. In the urine of a dog 
that died on the forty-third day after taking half a grain of antimony daily, there was 
such an amount of urea, that, on adding nitric acid, the whole urine solidified into one 
mass of crystals. The liver contained neither sugar nor glucogene. 
In the above case tartrate of antimony is seen to diminish oxidation, and in a very 
marked degree to increase the exhalation of carbonic acid gas. The total amount of 
oxygen is also increased, making it thereby appear as if oxygen had been developed 
from some one or other of the constituents of the blood, either while they were being 
pulled down, or built up into new compounds. The apparent increase of the oxygen 
may be due, however, to another cause, namely, the disappearance of nitrogen from 
the air. 
Oxygen. 
Carbonic acid. 
Nitrogen. 
Total oxygen. 
In 100 parts of atmospheric air 
20*960 
0*002 
79-038 
20*962 
Air from pure blood 
19*262 
1*818 
78*920 
21*080 
Ditto plus antimony 
20*41 
2*55 
77-04 
22*96 
This increase in the total amount of oxygen, or decrease in the amount of nitrogen, 
was even much more decided in another experiment with antimony on sheep’s blood. 
In it the oxygen actually amounted to 24 - 69 per cent., and the nitrogen stood at 75- 31 
per cent. 
