a new Eudiometer. 1 1 5 
time we delire, the error proceeding from thence is but fmaih 
The time which it took up in paffing in my experiments was 
ufually about $o"‘ 
The difference proceeding from the difference of fize of 
the bottle, and the nature of the water made ufe of is greater; 
for when I ufe the fmall bottle which holds three meafures, 
and fill it with diftilled water, the ufual diminution in trying 
common air is 1.08 ; whereas, if I fill the bottle with water from 
my tub, the diminution is ufually about .05 Ids. If I ufe the 
bottle which holds twelve meafures, filled with diftilled water, 
the diminution is about 1.15; and if I ufe the fame bottle, 
filled with water from my tub, about 1.08. 
The reafon of this difference is, that water has a power ot 
abforbing a fmall quantity of nitrous air ; and the more de- 
phlogifticated the water is, the more of this air it can abforb. 
If the water is of fuch a nature alfo as to froth or form bub- 
bles on letting in the common air, the diminution is remarkably 
lefs than in other water. 
The following table contains the diminution produced in 
trying common air in the bottle containing three meafures, with 
feveral different kinds of water, and alfo the diminution which 
the fame quantity of nitrous air fuffered by being only fhook 
in the fame bottle, without the addition of any common air, 
tried by flopping the mouth of the bottle with my finger, and 
fhaking it brilkly for one minute, and afterwards for one minute 
more. 
CL> 
Dimi- 
