” Miscellanies. 
devine, merely in the formation of carbonic acid in the win there 
are chemists whose results show that more oxygen is inspired than car- 
bonic acid expired.’ Messrs. Allen and Pepys observed that. this was 
constantly the case when the same air was repeatedly respired. 
Magnus adds, that this fact, so inexplicable by other theories, | i ul 
e conseq uence of the hypothesis founded on the law, that 
plicable as the preceding, namely, that by the respiration of oxygen, or 
by a mixture of oxygen and hydrogen, azotic gas is constantly expired, 
the volume of which is proportional to the bulk te gree seep 
that it cannot at all be attributed to the air. 
It now remains to be shown that the carbonic acid exinitie® from the 
blood is in sufficient quantity to account for the whole of that which the 
lungs expire. The results obtained on this subject are discordant ; those 
of Messrs. Allen and Pepys evidently exceed what they should be ; for 
Berzelius has shown, that if correct, it would require six pounds and a 
quarter of solid <ditiaheneit in twenty four hours to produce the quantity 
of ce consumed. 
Taking, then the results obtained by Davy as a mean of those of La- 
voisier, while en and Pepys, although perhaps a little too high, we shall 
have thirteen cubic inches as the quantity of carbonic acid gas expired 
we a man, If it be further admitted, that at each pulsation of the heart 
an ounce of blood arrives at the Ings, seventy five pulsations in a minute 
— convey five pounds of blood in the same time. This is the min- 
“ ‘which can be admitted; for it is very probable that five 
oss of blood pass through these organs every minute: these five 
unds produce dhiiticn cubic-imches.~ It has-been already mentioned 
sat the blood contains at least one fifth of its volume of carbonic acid ; 
and as a pound is equal to twenty five cubic inches, each pound of blood 
would contain at least five cubic inches of carbonic acid. It will be ob- 
served that no circumstance opposes the proposed theory, henc ex- 
periments prove, that the quantity of carbonic acid contained 
blood, is more than sufficient to furtrish the quantity — 
: Fea , Nov. we —Lond. anc 
ole saison parts — it conses in Cont aot 
othe gas. : ee 
‘Angie's circumstance adie by Moons Alin and Pepysis as inex” 
Hy 
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