a new Eudiometer. 
i z r 
Firft method. 
Second method. 
Nitrous air added flowlv 
to common without being 
in contact with water. 
Nitrous 
air. 
Bulk of 
mixture 
Teft. 
Nitrous 
air. 
Bulk of 
mixture 
Teft. 
Nitrous 
air. 
Bulk of 
mixture 
Teft. 
.716 
•474 
.856 
9*5 
.244 
•5*3 
•^35 
•43° 
.280 
.849 
.867 
•93° 
• 1 37 
•352 
•599 
.294 
.836 
•337 
The two-firfl lets of experiments were not tried with the 
apparatus above deferibed, as that held too fmall a quantity, 
but with another upon the fame principle. The lad: fet was 
tried by the apparatus reprefented in fig. 4. where A is a bottle 
containing nitrous air, inverted into the tub of water DE ; B 
is a bottle with a bent glafs tube C fitted to its mouth. This 
bottle is filled with common air, without any water, and is 
firft (lightly warmed by the hand ; the end of the glafs tube is 
then put into the bottle of nitrous air, as in the figure; confe- 
quently, as the bottle B cools, a little nitrous air runs into it, 
which, by the common air in it, is deprived of its elafticity, 
fo that more nitrous air runs in to fupply its place. By this 
means the nitrous air is added (lowly to the common without 
coming in contact with w r ater, till the whole of the nitrous air 
has run out of the bottle A into B ; then, indeed, the water 
runs through the glafs tube into B, to fupply the vacancy formed 
by the diminution of the common air. 
It appears from the foregoing table, that a quantity of ni- 
trous air, ufed in the firil method, does not phlog.if icate com- 
mon air more than three-fourths of that quantity ufed in the 
fecond way does, and not fo much as half that quantity ufed 
in the third way : fo that we may fafely conclude, that it is 
this circumfance of the nitrous air going further \n phlogifti- 
Vol. LXXIII. ’ R eating 
