2^6 Analyfts of the Air. 
The event was, that there was 18 cubick 
inches of air wanting 5 but as thefe receivers 
Were much too fmall to make the Experi- 
ment with accuracy $ that fome allowance 
may be made for errors, I will fet the lofs 
of elaftick air at 9 cubick inches, which is 
but tjt part of the whole air refpired, which 
will amount to 353 cubick inches in one 
hour, or 100 grains, at the rate of 48000 
cubick inches infpired in an hour, or one 
punce and a half in 24 hours. 
By pouring the like quantity of air to and 
fro under water, I found that little or none 
of it was loft , fo it was not abforbed by the 
Water : To make this trial accurately, the 
air muft be detained fome time under water, 
to bring it firft to the fame temperature with 
the water. Care alfo muft be taken in mak- 
ing this Experiment, that the lungs be in the 
fame degree of contraction at the laft breath- 
ing, as at the firft, elfe a confiderable error 
may arife from thence. 
But tho 9 this be not an exa£t eftimate, yet 
|t is evident from the foregoing Experiments 
<pn refpiration, that fome of the elafticity of 
the air which is infpired is deftroyed 5 and 
that chiefly among the veficles, where it is 
jpnoft loaded with vapours 5 whence probably 
* * fo 
