PHYSICAL AND CHEMICAL AGENTS UPON BLOOD. 
719 
Gas from sheep’s blood plus amylene, twenty-four hours’ action, 100 per cent, of atmo- 
spheric air : — 
No. 63. — In 100 parts of air. 
Carbonic acid 0-62 
Whereas the air from pure blood gave quite a different result. 
Gas from pure sheep’s blood after twenty-four hours’ action, 100 per cent, of air : — 
No. 64. — In 100 parts of air. 
Carbonic acid 3*17 
It thus appears that amylene has a marked effect in diminishing the exhalation of 
carbonic acid gas. 
Action of Mineral Substances on Blood. 
Chloride of Mercury ( Corrosive sublimate). 
The experiments with mineral products were in general conducted in the same 
manner as those with other substances. In the present instance, however, the experi- 
ment was like some of the exceptions previously related, slightly modified, and instead 
of employing defibrinated blood, the blood was put into the receivers direct from the 
animal. Calf’s arterial blood was used in this case, and as it slightly coagulated in the 
vessels, it was found necessary to have them well shaken (before being definitely closed) 
until the coagula were all broken up. While to one of the portions of blood nothing 
was done, to the others 6 drops of a saturated aqueous solution of corrosive sublimate 
were added. The quantity of blood employed in each case amounted to 40 grammes, 
and the air confined with it to 150 per cent. The receivers were all treated alike, 
during twenty-four hours, in a room of moderate temperature. At the end of that 
time a marked difference was observed in the bloods. The pure blood still retained 
its arterial tint, while that to which corrosive sublimate had been added was of an 
intensely dark, almost black colour. Moreover the latter had separated into two layers, 
a thin dark red liquid, and a somewhat gelatinous coagulum. The dark liquid part of 
the blood felt quite sticky to the fingers. 
Gas from pure calf’s blood after twenty-hours’ action with 150 per cent, of atmo- 
spheric air : — 
No. 65. — In 100 parts of air. 
Oxygen . . 
Carbonic acid 
Nitrogen . . 
16-57 
2-15 
81-28 
5 G 
jTotal oxygen 18*72 
MDCCCLXV. 
