be 
/ 
; 
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af 
ibis 
on the Absorption of Carbonic Acid Gas by Liquids. 109 
It is further evident that admitting this law, all the numbers 
(p) in the column of barometric heights may be reduced to one 
standard number, as for example 30 inches, without at all chang- 
ing the volume of V. Thusat 50° while one hundred and twen- 
ty volumes are absorbed under a pressure of 29-46 inches, one 
hundred and twenty volumes will also be absorbed at a pressure 
of 30 inches, the latter volumes being denser than the former in 
the proportion of 30 to 29°46. 
The last column of the table represents the values of V, con- 
tained in column 6, after they have been reduced to the common 
temperature 60°. ‘These numbers therefore indicate the relative 
vad or ee of carbonic acid absorbed at the tempera- 
tures rec 
The slasines of the 177 a sis cae 
soviet to nie tem- 447.9) 
rature is simply pic 
tured in the ce al 122-2 = : 
nying diagram, where __ i 
the temperatures are ed 
measured in the hori- 838 Th 
zontal, and the corres- 96 et 
ponding absorptionsin §59.3——}—___-__—___—__—_ + 
the vertical direction. 
It will be remarked 
that this curve a | 
proaches the horizon- Fe DO BO ae 
tal axis less rapidly, as the temperature rises, so that, for example, 
the absorption is greatly more diminished in passing from 40° to 
60°, than in passing from 60° to 80°, and still more than in pass- 
ing ‘from 80° to 100°. 'This would lead to the inference that at 
temperatures much above 100°, we should find the absorption 
still quite considerable. 
To satisfy ourselves on this point, we made repeated experi- 
ments at 150° and 212°, by passing a stream of gas from the pipe 
of the gasometer through a measured quantity of water, main- 
tained by a peculiar lamp arrangement, at the proposed tempera- 
2k The pipe being bade while the ee was con- 
, any floating carbonic acid was removed from the surface 
of the liquid by a blast se air, and a solution of baryta was then 
ded. In the water at 150°, a very copious eosin was 
was separated by filtration under a vessel kept full 
of iydmoech gas to prevent the absorption of atmospheric carboni¢e 
acid by the precipitant, and the weight of the carbonate deter- 
mined by the method of double filters. 
Bl ee eerie 14:5 cubic inches of water at 150°, oe 
grs. of carbonate of baryta, which corresponds to vo. 
mes of carbonic acdaiilidi de hich rT ed. 
