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Analyfis of the Air. 243 



of it was loft 5 ib it was not abforbcd by 

 the water : To make this tryal accurately, the 

 air mult be detained fome time under water, 

 to bring it firft tothc lame temperature with 

 the water. Care alfo muft be taken in mak- 

 ing this Experiment, that the lungs be in the 

 fame degree of contra&ion, at the J aft breath- 

 ing, as at the firft, clfe a confidcrablc error 

 may arife from thence. 



But tho' this be not an exact cftimatc, yet 

 it is evident from the foregoing Experiments 

 on refpiration, that fome of the elafticity of 

 the air, which is infpircd, isdeftroyed; and. 

 that chiefly among the veilcles, where it is 

 moft loaded with vapours j whence probably 

 fome of it, together with the acid fpirits, 

 with which the air abounds, are conveyed 

 to the blood, which we fee is by an admi- 

 rable contrivance there fpread into a vaft 

 expanfe, commenfurate ro a very large fur- 

 face of air, from which it is parted by very 

 thin partitions ; fo very thin, as thereby 

 probably to admit the blood and air particles 

 (which arc there continually changing from 

 an elaftick to a ftrongly attracting ftate ) 



within the reach of each other's attraction, 



R 2 whereby 







r #, 





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