3 6 Mr. William Henry’s Experiments on the 
or 0.15 of a measure. But, of those, .13 existed previously in 
the 20 measures of carbonic acid gas ; and the 20 measures of 
water had, therefore, only given up .02 of a measure, or about 
__L_ of its bulk. I apprehend, however, that the whole of the 
common air was not, even thus, extricated from the water. 
In experiment 6 , the 3 residuary measures contained ^ of 
common air. 
To judge of the influence of temperature, it is essential that 
the experiments compared should be on similar proportions of 
gas and water. Thus, from a comparison of experiment 1 and 
2, it appears, that about of the whole bulk absorbable at 
33 0 , is the diminution of the quantity of absorption produced 
by each elevation of io° of temperature ; and the same inference 
follows from various other experiments, the results of which I 
have thought it needless to state.* 
2. Sulphuretted Hydrogen Gas. 
One hundred parts of water, at 33 0 of temperature, absorb 86 
parts of this gas, obtained from sulphuret of iron and dilute 
sulphuric acid, a residue being left, equal in bulk to the gas 
absorbed. At 83°, under similar circumstances, the same quan- 
tity absorbs 78. 
3. Nitrous Oxide. 
At 45 0 , 100 cubic inches of water take up 30 of nitrous 
oxide ; and, at 70°, the same quantity takes up only 44. Ac- 
cording to Mr. Davy, in whose experiments, from his intimate 
• During the -absorption of carbonic acid by water, the gas and water having pre- 
viously the same temperature, there is an extrication of caloric, sufficient to raise the 
temperature of the water between \ and f of a degree of Fahrenheit. The same 
effect is produced by the condensation of sulphuretted hydrogen, and nitrous oxide gases, 
though less apparently. To perceive this phenomenon, considerable quantities of gas 
and water should be used. 
