I 6 8 Analyjis of the • Alt. 



increafed in weight fix grains in three minutes <, 

 but they made no increafe in weight in the 

 fame time, when in the open air : which fix 

 grains in three minutes is at the rate of about 

 6 -flounces in 24 hours; and this is nearly 

 the fame proportion of moifture that I ob- 

 tained by breathing into a large receiver full 

 of fpunges. But the fix grains imbibed by 

 the four Diaphragms in three minutes, was 

 not near all the vapours which were in that 

 bulk of inclofed air ; for at the end of the 

 three minutes, the often refpired air was fo 

 loaded with vapours, which in that floating 

 ftate were eafily, by their mutual attraction, 

 formed into combinations of particles, too 

 grofs to enter the minute veficles of the 

 lungs, and was therefore unfit for refpira- 

 tion ; fo that it is not eafy to determine what 

 proportion is carried off by refpiration, efpe- 

 cially confidering that fome of the infpired 

 air, which has loft its elafticity in the lungs, 

 is mingled with it. But fuppofing 6 + jl 

 ounces to be the quantity of moifture car- 

 ried off by refpiration in twenty-four hours, 

 then the furface of the lungs being found, 

 as above, 41635 fquare inches, only y^- part 

 of an inch depth will be evaporated off 

 their inward furface in that time, which 



is 



