Appendix to Mr. William Henry’s Experiments , &c. 273 
than the one before stated; and have repeatedly observed its 
amount to be 10 6 or 108 by 100 measures of water, at 6o° of 
Fahrenheit, which temperature is to be understood in all the 
following experiments. 
Of several experiments on the absorption of Nitrous Oxide, 
I take the following, as a fair example of the whole. I agitated, 
at three several times, 1175 measures of nitrous oxide, with 
1320 measures of water ; 1025 parts of gas disappeared, and 
the unabsorbed remainder (130) contained 13 of foreign admix- 
tures. It follows, that 100 parts of water had taken up 77.6 of 
nitrous oxide; and, after adding to these the diminution of ab- 
sorption occasioned by the impurity of the residuum, it may be 
inferred, that 100 parts of water would absorb 86 of absolutely 
pure nitrous oxide. 
With respect to the remaining gases, I have been prevented, 
by urgent professional engagements, from examining the quan- 
tity of each, absorbable under similar circumstances, except in 
the instances of oxygenous, azotic, and hydrogenous gases. 
The results of these experiments are comprised in the follow- 
ing Table. The first column shows the quantity of gas which 
100 parts of water, at 6o°, have actually absorbed ; the second, 
the quantity which ought to be taken up, provided the residue 
were in a state of absolute purity. In the example of nitrous 
gas alone, the estimated is less than the actual absorption ; be- 
cause a small portion of this gas loses its aerial form, by union 
with the oxygenous gas, from which water cannot be entirely 
freed. 
