



Amlyfis of the Atr. 16 j 



I have found that when the 'Diaphragms 

 had lomc ("mall degree of dampnefs, they 

 incrcafed in freight fix grains in 3 minutes j 

 but they made no incrcafe in weight in 

 the fame time, when in the open air : which, 

 fix grains in 3 minutes, is at the rate of a- 

 bout 6 -|- 4- ounces in 24 hours ; and this 

 is nearly the fame proportion of moifturc 

 that I obtained by breathing into a large 

 receiver full of fpunges. But the 6 grains 

 imbibed by the four "Diaphragms in 3 mi- 

 nutes, was not near all the vapours which 

 were in that bulk of inclofed air ; for at 

 the end of the 3 minutes, the often refpi- 

 red air was fo loaded with vapours, which 

 in that floating ftate were eafily, by their 

 mutual attraction, formed into combina- 

 tions of particles, too grofs to enter the mi. 

 nute veficles of the lungs, and was therefore 

 unfit for refpiration ; fo that it is not eafte 

 to determine what proportion is carried off 

 by refpiration, efpccially confidering that 

 fomc of the infpiced air, which has loft its 

 elafticity in the lungs, is mingled with it. 

 But fuppofing 6+4- ounces to be the quan- 

 tity of moifture carried off by refpiration 

 in 24 hours, then the furfacc of the lungs 



being 









■ 

 ■ 







1 '■ 



1 





