438 Abbe Fontana’s Account of Airs 
fibly diminilh in water. With nitrous air it gave II— 14, 
II- 25, II+25, when common and the fame nitrous air 
gave II- 14, Il + ro, III+10; confequently it was de- 
phlogifticated air, viz. purer than the air of. the Seine 
and Arqueil, which are much better than common air. 
I had the curioiity to try, whether any difference would 
arife from boiling diftilled water in a matrafs of tin in- 
ftead of glafs veffels; and found, that the firft air was di- 
minifhed one tenth by being lhaken in water, and after- 
wards with the nitrous air gave II- 13, II- 16, III— 18, . 
when common air gave II— x 2, .11 + 8 ; which Ihews that 
it was dephlogifticated air, but not fo good as that ex- 
tracted from the fame water when boiled in glafs veffels. 
The fecond quantity of air was not fenfibly diminifhed 
in water, and with nitrous air gave II- 13, II- 20, 
III- 30 ; that is, it was more dephlogifticated than the., 
firft. 
The air extracted from diftilled water is to that ex- 
trailed from the water of. the river Seine as 13 to 32; 
nearly whence diftilled water does not give more air 
than one fixtieth of its bulk: but as the air extracted 
from the water of the Seine is half fixed air, it may be 
concluded, that the quantity of relpirable air produced by 
both kinds of waters is nearly the fame, and that they only 
differ a little in purity. It is however true, that other ex- 
x periments 
