a — 
on the Absorption of Carbonic Acid Gas by Liquids. 107 
gas, experiments were made to determine if any further absorp- 
tion was caused by a renewal of the charge. This was done b 
removing the flask, driving a stream of CO, into the bottle, a 
sing the orifice by an air-tight stopper, readjusting the levels, an 
submitting the liquid to further agitation. Repeated trials at 60°, 
gave no indications of additional absorption. We would there- 
fore regard our results as furnishing a nearly accurate measure 
the absorption of carbonic acid by pure water. 
These results, together with the conditions under which the 
observations were made, are comprised in the following table. 
Table of the Absorption of Carbonic Acid by Water, from 32° to 212°. 
No. ak. External | po om,| APP: 2s. | Mean of Mean abs. | Tension 
of COz |thermom-| ~27°™ by app. abs. jof dry CO.) of gas jodie 
Ex. © HO. eter. ~ #*. 1100;2..—10. =V. A =p-f. | to 60°.. 
oe | 545% 48 | 166: 
2) 54 yd 166°5 166-25 165-08 29:28 | 175-72 
3) 40 55 )*4 1425 ‘ 
4 40 65.2% 4 142- 142-25 140:8 29-21 | 147-94 
5 555 )4 119-5 
f “bod . ) 4 120-5 120- 118-44 29:1 | 122-27 
64:5 )r4 100-5 
f ) 64:5. )-4 100-2 
) ) 645 Jee 100-5 100-4 
10 | ¢ 65 ). 100-5 . 
65 ) 100:8 er any 98-5 28-82 | 100-5 
12 | 65 )- 100-5 
13 65 ): 100-5 100-6 
3 72 y 85:5 ° 
15 ) 72 y21 |. 85-5 85-5 83-36 | 2848 | 83-86. 
16 75 J: m6 
i ) 75 » 715 71:25 63°75 28:5. | 68-60 
18 | 90 80-5 54 60-5 
19}. 90 80-5 54 61:2 60-85 778 28-18 | 57-50 
2011 80°5 54 54:5 
8 100 80-5 9:54 54 94:25 49-83 27-68 | 50-39 
On comparing the second and third columns in the above table, 
- it will be seen that, in the observations from 50° to 80° inclusive, 
the temperature of the contiguous air in no case differed from 
that of the apparatus by more than 5°-5. Hence during the few 
minutes occiipied in each experiment, the temperature even of 
the smaller reservoir experienced only a very slight and quite un- 
important change, amounting in none of the experiments to as 
much as one-tenth of adegree. Inthe experiments at 40°, it 
was found easy to maintain a uniform temperature by a few frag- 
ments of floating ice, and in those at 32°, the use of a large 
unchanged. The observations at 90° and 100°, were attended 
with a slight cooling in the small reservoir, which however, in 
no case exceeded one degree, an amount too small to cowed 
y ; 
The above table presents we believe the first spinemntic seri 
of piaicvicbas on the comparative absorption of CO,, by water “ 
aie eo eee ie » Pe Sa aor ey aie. Pe. 3p t 
Ed 
