* 
Miscellanies. 
carboti in the blood by the action of the it oF ates 6 venous blood, 
when it reaches the organs of respiration, cor carbonic —-= ready 
prive the gas of any carbonic acid which it bi dight contsinl when it 
gave no precipitate with lime water he passed it into the blood ofa Ayer 
man ; the gas afterwards made to go through lime water gave a plentiful 
» precipitate of carbonate of lime. Azotic gas similarly employed produced 
_ alike effect; and M. Magnus concludes, from these experiments, that 
carbonic acid exists ready formed in the blood, and consequently that it 
is not formed in the lungs. Carbonic acid was also separated from blood 
¥ by means of the air-pump. 
| By using Liebig’s apparatus M. Magnus found that blood coutainel 
about one fifth of its volume of carbonic acid gas, and when it had been 
kept twenty four hours, without emitting any bad smell, the quantity was 
larger. The results were confirmed ca employing atmospheric air wa 
_ stead of hydrogen gas. me. a 
M. Magnus then ascertained nas nature and proportions of all ‘the 
gaseous contents of the blood. He found = one | d volumes. 
the arterial blood of a horse yielded 
eas eee 
= Pa 
Carbonic acid gas, - ~ . 
Oxygen, ise se 
Azote, Be 1 - . ox ete 
= Total, 7.84 7.84 vols, 
The venous blood of the same horse, drawn four. Mays afterwards, gave 
Carbonic acid gas, - 4.29. 7. iat 
» >) .q, Oxygen, - - . : ome 
Azote, 
is 
why 
* animals, amount (0. about one eighth or one tenth of the quantity em- F 
- ployed. He admits however that the experiments are not absolutely pre- 
2 cise, because they were not all continued the same length of time, &c. 
But he observes, that as the proportions between the oxygen and carbonic 
acid are invariably the same, these results may be regarded as satisfactory. 
~~ With regard to the theory of respiration, all experimentalists agree as 
the carbonic acid expired and of 
_ 
