PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
153 
Crystals dried at 120°. 
II. — Experiments with Naphtha A. Glass 1. Temperature of the Air 10°'9-ll o, 31. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
& 
X. 
sp. H. 
O 
0 
0 
o 
grms. 
grms. 
gnu. 
grm. 
44-2 
12-9 
12-63 
9-97 
26-94 
2*84 
1*555 
0-431 
0-661 
0-341 
42-2 
12-6 
12-33 
9-81 
26-95 
T. ) 
*5 
r) 
55 
0-343 
45-4 
13-3 
12-96 
10-30 
26-985 
55 
55 
55 
55 
0-322 
46-7 
13-0 
12-72 
9-77 
26-935 
„ 
1-535* 
55 
55 
0-368 
Mean . . . O' 344 
The mean of the means of both series of experiments, 0-356 and 0-344, gives for the 
specific heat of sulphate of ammonia between 13° and 45° the number 0-350f. 
71. Sulphate of Lead, Bb£G 4 . Fragments of transparent crystals of lead- vitriol 
from Miisen, near Siegen. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 17°-6-17°*4. 
T. 
O 
T'. 
o 
t'. 
t. 
O- 
M. 
grms. 
m. 
grms. 
/• 
grm. 
y- 
X* 
grm. 
sp. H. 
48-3 
19-6 
19-33 
16-90 
26-975 
12-575 
1-47 
0-431 
0-651 
0-0795 
50-9 
19-3 
19-00 
16-23 
26-96 
55 
55 
55 
55 
0-0858 
49-9 
19-3 
19-01 
16-33 
26-985 
„ 
55 
55 
0-0858 
50-4 
19*6 
19-24 
16-63 
26-99 
55 
1-45* 
55 
Mean 
55 *' 
0*0798- 
0-0827 
Sulphate of Baryta , Ba S0 4 . Cleavage pieces of crystal of heavy spar from the 
Auvergne. 
I. — Experiments with Naphtha A. Glass 1. Temperature of the Air 15°T-15 0, 9. 
T., 
T'. 
t'. 
t. 
M. 
m. 
/• y- 
X. 
sp. H. 
o 
0 
o 
o 
grms. 
grms. 
grm. 
grm. 
46-5 
17-4 
17-12 
14-64 
26-945 
9-15 
1-405 0-431 
0-651 
0-113 
48-5 
17-5 
17*17 
14-56 
26-97 
55 
55 55 
5? 
0-111 
44-6 
17-4 
17-05 
14-82 
26-97 
55 
1-395* „ 
Mean 
55 
0-105 
0*110 
* After drying the stopper. 
t I had made a third series of experiments with large dry transparent crystals of sulphate of ammonia, but 
in which t' exceeded more than usual the temperature of the air, and hence numbers were found for the body 
investigated which are somewhat too small. 
Experiments with Naphtha A. Glass 2.. Temperature of the Air 9°-7. 
t: 
T' 
t'. 
U 
M. 
w. 
/• 
& 
X. 
sp^ H. 
45-6 
O 
12-4 
12-05 
8-86 
grms. 
26-935 
grms. 
3-725 
grms. 
2-015 
0-431 
gnn. 
0-487 
0-331 
47-1 
12-8 
12-45 
9-22 
26-97 
„ 
„ 
,, 
0-318 
42-9’ 
12-6 
12-25 
9-42 
26-99 
„ 
„ 
55 
,, 
0*313 
44-1 
12-5 
12-22 
9-24 
26-95 
,, 
„ 
>> 
55* 
0-318 
47-0 
12-7 
12-36 
9-16 
26-94 
„ 
1-985® 
, r 
0-314 
® After removing some naphtha from the stopper. 
Y 2 
