346 Jnalyjis of the Air. 



The event was, that there were 18 cubick 

 inches of air wanting ; 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 nine cubick inches, which 

 is but tir P art °f t ^ e whole air refpired, 

 which will amount to 353 cubick inches in 

 one hour, or 100 grains, at the rate of 84000 

 cubick inches infpired in an hour, or five 

 ounces 216 grains, 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; (o it was not abibrbed 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 alio muft be taken in make- 

 jng this Experiment, that the lungs be in the 

 lame decree of contraction at the laft breath- 

 ixig, as at the firft 5 eife a confiderable error 

 may arife from thence. 



But tho' this be not an exact eftimate, yet 

 it is evident from the foregoing Experiments 

 on rcfpirati on, that fome of the elafticity of 

 the air which is infpired is deftroyed; and 

 that chiefly among the veficles, where it is 

 moil loaded v/ith vapours 3 whence probably 



fome 



