PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
157 
Experiments with Naphtha A. Glass 1. Temperature of the Air 14°-4-15°-Q. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
Q 
o 
0 
grms. 
grms. 
grm. 
grm. 
3,0-9 
15-7 
15-43 
14* * * § 03 
26-93 
3-49 
1-645 
0-431 
0-651 
0-321 
32-3 
16-0 
15-65 
14-13 
26-96 
55 
55 
55 
55 
0-331 
30-8 
15-8 
15-52 
14-03 
26-95 
55 
„ 
„ 
55 
0-377 
32-8 
16-1 
15-83 
14-23 
26-97 
.55 
1-635* 
55 
55 
0-352 
In all these experiments the crystals employed remained clear. The mean of the six 
experiments gives 0-347 as the specific heat of crystallized sulphate of zinc. 
Crystallized Sulphate of Iron, Ee S0 4 +7 H 2 0. Dry crystals of green vitriol. 
Experiments with Naphtha A. Glass 2. Temperature of the Air 16°T. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X . 
sp. H. 
0 
o 
o 
grms. 
grms. 
grm. 
grm. 
47-9 
18*6 
18-32 
15-56 
26-93 
3-47 
1-91 
0-431 
0-487 
0-354 
47-5 
18-6 
18-25 
15-55 
26-925 
„ 
„ 
„ 
„ 
0-347 
46-0 
18-5 
18-21 
15-64 
26-955 
55 
55 
55 
55 
0-348 
44-6 
18-4 
18-13 
15-73 
26-96 
„ 
1-895* 
55 
55 
0-336 
Mean . . . 0-346 
Crystallized Sulphate of Cobalt, Co B0 4 +7 H 2 G. Crystals of the salt isomorphous 
with green vitriol. In the following experiments the crystals remained transparentf . 
Experiments with Naphtha A. Glass 2. Temperature of the Air 13°'4-13°-2. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
0 
o 
o 
grms. 
grms. 
grm. 
grm. 
31-6 
14-9 
14-63 
12-96 
26-97 
3-445 
1-895 
0-431 
0-487 
0-405 
29-9 
14-8 
14-54 
13-14 
26-945 
55 
55 
55 
,, 
0-347 
28-4 
15-0 
14-67 
13-43 
26-93 
55 
55 
55 
55 
0-345 
31-6 
15-2 
14-94 
13-44 
26-94 
1-885* 
55 
0-338 
Mean . . . 0-343 J 
vitriol undergo an essential change. At the end of the experiments they were opaque, and no longer detached, 
as before, hut as if swollen up in the glass. These experiments gave the following numbers : — , 
Experiments with Naphtha A. Glass 1. Temperature of the Air 14°-8-14°-4. 
T. 
T'. 
t'. 
t. 
M. 
TO. 
/• 
y- 
X . 
sp. H. 
o 
O 
0 
0 
grms. 
grms. 
grm. 
grm. 
47-4 
17-0 
16-74 
13-62 
26-94 
3-465 
1-695 
0-431 
0*651 
0-399 
47-6 
17-0 
16-72 
13-62 
26-945 
„ 
„ 
„ 
0-389 
45-1 
16-9 
16-63 
13-77 
26-975 
„ 
1-655 § 
„ 
0-396 
43-8 
17-1 
16-83 
14-22 
26-99 
„ 
,, 
„ 
0-368 
* After drying the stopper. 
f In a series of experiments, in which the temperature amounted to 50°, the crystals of sulphate of cobalt 
with seven atoms of water underwent a change ; they were opaque, and stuck in the glass as if swollen up ; 
and the numbers found for the specific heat were considerably greater. 
J Excluding the first experiment. The temperature of the glass, together with the solid substance and the 
liquid, exceeded in all experiments the final temperature of the water in the calorimeter only by about 15°. 
§ After removing some naphtha from the stopper. 
