110 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
I. Experiments with Naphtha A. Glass 1. Temperature of the Air 18 o, 9-19 0, 2. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y • 
X. 
sp. H. 
O 
O 
o 
0 
grms. 
grms. 
grm. 
grm. 
52*9 
20*8 
20*53 
18*13 
26*955 
3*135 
1*825 
0*431 
0*651 
0*184 
52*6 
20*9 
20*63 
18*26 
26*98 
„ 
33 
„ 
0*185 
51*7 
20*7 
20*42 
18*06 
26*97 
33 
35 
33 
„ 
0*196 
52*4 
20*9 
20*58 
18*23 
26*98 
33 
1*805* 
33 
J? 
0*186 
Mean . . . 0T88 
II. — Experiments with Naphtha A. Glass 3. Temperature of the Air 20°*5-20°*8. 
T. 
T'. 
t' 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
52*6 
22*6 
22*33 
20*23 
grms. 
26*985 
grms. 
3*345 
grm. 
1*935 
0*431 
grm. 
0*453 
0*180 
52*2 
22*5 
22*23 
20*14 
26*985 
33 
33 
33 
33 
0*183 
52*3 
22*5 
22*20 
20*12 
26*965 
33 
33 
33 
33 
0*179 
52*5 
22*6 
22*31 
20*22 
26*955 
1*91* 
33 
33 
0*182 
Mean . . . 0*181 
These determinations give as the average of the means of both sets of experiments 
the number 0*185 as the specific heat of gas-carbon between 22° and 52°. 
Natural graphite from Ceylon. Left very small quantities of ash when calcinedf. 
I. — Experiments with Naphtha A. Glass 3. Temperature of the Air 18°*9-19°*2. 
T. 
T'. 
t'. 
t. 
M. 
o 
o 
o 
0 
grms. 
51*4 
20*8 
20*48 
18*13 
26*975 
51*4 
20*8 
20*51 
18*13 
26*99 
51*8 
20*8 
20*54 
18*15 
26*975 
52*0 
20*8 
20*54 
18*13 
26*99 
* After drying the stopper, 
t In Mr. Hubeb’s analyses this substance was 
m. 
/• y- 
X . 
sp. H. 
grms. 
grms. 
grm. 
4*025 
2*085 0*431 
0-453 
0*179 
55 
33 
0*186 
„ 
?5 
33 
0*181 
„ 
2*06* „ 
33 
0*183 
Mean 
0*183 
in a platinum boat, then burned in a porcelain tube in 
oxygen. 
I. 
II 
III. 
Carbon 
99-11 
98-52 
Hydrogen . . 
0-17 
0-06 
Ash 
. . 0-26 
0-27 
0-51 
99-55 
99-09 
The residual porous ash left after the combustion was tolerably white, with admixed red particles. 
