158 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
75. Crystallized Sulphate of Magnesia and Potass , Mg K 2 S 2 O s + 6 H 2 O. Well- 
shaped crystals. 
Experiments with Naphtha A. Glass 3. Temperature of the Air 17°’0-17°-2. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X . 
sp. H. 
51-0 
19-4 
19-13 
16-43 
grms. 
26-99 
grms. 
4-135 
grms. 
1-735 
0-431 
grm. 
0-453 
0-267 
51-0 
19-3 
19-02 
16-33 
26-965 
5 5 
55 
55 
55 
0-263 
50-0 
19-3 
19-02 
16-43 
26-96 
55 
55 
55 
55 
0-260 
50-2 
19-4 
19-06 
16-44 
26-95 
55 
1-715* 
55 
55 
0-266 
Mean . . . 0-264 
Crystallized Sulphate of Zinc and Potass , -Zn K 2 S 2 G 8 -(-6H 2 0. W ell-shaped crystals ; 
in both the following series they remained transparent and unchanged. 
1. — Experiments with Naphtha A. Glass 1. Temperature of the Air 19°-8-19°-9. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
40-2 
21-7 
21-37 
19-73 
grms. 
26-925 
grms. 
3-965 
grm. 
1-535 
0-431 
grm. 
0-651 
0-271 
40-6 
21-7 
21-42 
19-75 
26-935 
3 , 
55 
55 
55 
0-269 
40-2 
21-7 
21-38 
19-73 
26-955 
55 
55 
55 
55 
0-275 
39-8 
21-7 
21-40 
19-83 
26-925 
55 
1-52* 
55 
55 
0-260 
Mean 
0-269 
II. — Experiments with Naphtha A. Glass 2. 
Temperature of the Air 14°-8-14 0, 4. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X . 
sp. H. 
48-9 
16-9 
16-64 
13-63 
grms. 
26-94 
grms. 
4-365 
grm. 
1-98 
0-431 
grm. 
0-487 
0-273 
47-2 
16-8 
16-50 
13-63 
26-92 
55 
55 
55 
0-275 
48-0 
16-9 
16-61 
13-69 
26-98 
55 
55 
„ 
0-273 
45-7 
16-9 
16-63 
13-96 
26-97 
„ 
1*965 ’ 
55 
55 
0-267 
Mean 
0-272 
The mean of the means of both series of experiments gives 0-270 as the specific heat 
of crystallized sulphate of zinc and potass between 19° and 40°-50°. 
Crystallized Sulphate of Nickel and Potass , Ni K 2 S 2 0 8 +6 H 2 O. Well-formed 
crystals. 
Experiments with Naphtha A. Glass 2. Temperature of the Air 13 0, 3-13°-5. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
2 /* 
X. 
sp. H. 
49-1 
o 
16-1 
15-84 
12-77 
grms. 
26-94 
grms. 
4-775 
grm. 
1-945 
0-431 
grm. 
0-487 
0-247 
45-1 
15-6 
15-34 
12-61 
26-96 
55 
„ 
55 
>» 
0-245 
45-5 
15-8 
15-46 
12-73 
26-945 
55 
55 
55 
„ 
0-241 
44-0 
15-6 
15-32 
12-69 
26-975 
55 
1-925* 
55 
jj 
0-247 
Mean . . . 0*245 
* After drying the stopper. 
