430 
DR. E. FRANKLAND ON A NEW SERIES OF 
ture, and also to determine its specific gravity, it was submitted to diffusion in an 
apparatus which I have already described*: the following results were obtained; — 
I. In Diffusion Eudiometer. 
Observed 
volume. 
Temp. 
Difference of 
mercury level. 
Barom. 
Corrected vol. at 0*^ C. 
and 1 metre press. 
0 
mm 
mm 
Volume of gas used (dry) 
173*0 
19*0C. 
20*1 
741*1 
1 16*61 
Volume after diffusion 1 
(dry) ..... I 
144*3 
19*2 
46*3 
740*8 
93*63 
11. Estimation 
of Oxygen in residual 
gas. 
Volume of gas used (moist) 
1 117*5 
19*3 
53*1 
740*6 
75*44 
Volume after absorption) 
/* 1 U 1 
of 0 (dry) . ... f 
17*0 
69*3 
742*8 
64*16 
III. Combustion of Gas remaining after absorption of Oxygen. 
Observed 
volume. 
Temp. 
Difference of 
mercury level. 
Barom. 
Corrected vol. at 0°C. 
and 1 metre press. 
0 
mm 
mm 
Volume of gas used (moist) 
1 155*9 
17*3C. 
558*7 
743*3 
24*91 
Volume after admission of] 
O (moist) . . . . J 
1 302*7 
17*7 
399*0 
744*0 
93*78 
Volume after explosion ] 
(moist) j 
j> 270*2 
17*6 
433*2 
744*2 
75*13 
Volume after absorption' 
of CO 2 (dry) . . . . 
j* 246*3 
17-8 
458*7 
744*7 
66*13 
Volume after admission ' 
of H (dry) . . . . . 
j- 522*3 
17*9 
182*4 
745*1 
275*80 
Volume after explosion 1 
, . , ^ > 349*5 
(moist) J 
18*0 
350*5 
745*0 
124*30 
The gas, remaining after diffusion and subsequent absorption of oxygen, therefore 
contained in 24‘91 vols. 15*63 vols. nitrogen and 9*28 vols. combustible gas, which 
last was a single gas and not a mixture, since it consumed the same amount of 
oxygen and generated the same amount of carbonic acid after as before diffusion : — 
Volume of combustible gas. Oxygen consumed. COj generated. 
9*28 18*37 9*00 
1 : 1*98 : *97 
Experiments Nos. I., II. and III., taken together, enable us to ascertain the volume 
of the gas which escaped and that of the air which entered during the diffusion expe- 
riment ; these volumes are as follow : — 
Volume of gas escaped 86*95 
Volume of air entered 63*97 
* Quarterly Journal of Chemical Society, vol. ii. p. 283. 
