extracted from different Kinds of Waters. 437 
water, which by this mixture became acidulous; it pre- 
cipitated the lime in lime water, extinguifhed a light fe- 
veral times, and killed an animal inftantly. It is there- 
fore partly fixed air, and partly air which is not only 
better than common air, but likewife than that extracted 
from Seine water, even when this laft has been boiled 
in glafs veffels. 
The experiments being repeated with the fame water 
of Arqueil, but in glafs veffels, the air obtained, after 
being fhaken in water, was much better than that ob- 
tained from the fame matter, when boiled in veffels of 
tin. 
I have alfo extracted the air from diftilled water in 
glafs veffels, and having fhaken one meafure - 3 2 parts 
of it in water, it was reduced to one meafure - 35 parts. 
With the tefl of nitrous air it gave 1 - 6 , when equal 
parts of common and nitrous air gave I- 2, which 
lhewed that it was better than common air. 
I extracted the air again in the manner above de- 
fcribed; but it was not fenfibly diminilhed when fhaken 
in water. Two meafures - 49 parts of it, with the teft 
of nitrous air, gave 1-2, 1 + 8, when common air, Sec. 
gave I+i,I+i 8: It is therefore better than common air. 
I extracted the air from a great quantity of diftilled 
water in the ufual manner, and found that it did not fen- 
Vol. LXIX. M m m fibly 
