120 
PEOFESSOB KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
Sulphide of Mercury, -HgS. Pieces of a sublimed cake of cinnabar*. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 20 o, 3-21°T. 
T. 
T'. 
t\ 
t- 
M. 
m. f. y. 
X. 
sp. H. 
O 
o 
o 
o 
grms. 
grms. grm. 
grm. 
50-9 
22-2 
21-94 
19-79 
26-95 
13-44 1-565 0-431 
0-651 
0-0516 
51-8 
22-3 
22-02 
19-80 
26-95 
55 55 55 
35 
0-0523 
51-2 
22-4 
22-05 
19-92 
26-98 
55 55 55 
33 
0-0499 
51-8 
22-4 
22-14 
19-93 
26-98 
„ 1-55 f „ 
Mean , 
” 
0-0528 
0 - 0517 " 
Sulphide of Zinc. -Zn -S. Fragments of crystals of black Zinc-blende from Bohemia. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 14°T. 
T. 
T'. 
t'. 
t. 
M. 
to . 
/• 
y- 
sp. H. 
■ 0 
O 
o 
o 
grms. 
grms. 
grm. 
grm. 
50-8 
16-3 
16-02 
13-18 
26-975 
7-00 
1-64 0 
•431 
0-651 
0-123 
46-7 
16-1 
15-83 
13-33 
26-935 
55 
55 • 
55 
55 
0-120 
44-1 
15-9 
15-63 
13-32 
26-94 
55 
55 
55 
55 
0-121 
44-8 
16-2 
15-93 
13-63 
26-94 
5? 
55 
55 
55 
0-116 
43-1 
15-9 
15-63 
13-42 
26-97 
5? 
1-625 f 
55 
55 
0-120 
Mean . . . 0T20 
Sulphide of Lead, Pb -S. Cleavage fragments of Galena from the Harz. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 14°-5-14°-9. 
T. 
T'. 
t\ 
t. 
M. 
TO. 
/• y- 
X. 
sp. H. 
o 
o 
0 
o 
grms. 
grms. 
grm. 
grm. 
51-3 
16-4 
16-05 
13-34 
26-93 
13-835 
1-78 0-431 
0-651 
0-0486 
48-6 
16-4 
16-05 
13-54 
26-975 
55 
55 55 
55 
0-0495 
45-7 
16-1 
15-83 
13-53 
26-95 
55 
55 55 
55 
0-0489 
48-4 
16-2 
15-94 
13-44 
26-925 
55 
1-765 f „ 
Mean 
55 
0-0490 
0-0490 
* This cinnabar was found, on being tested, to be free from admixed uncombined sulphur. In experiments 
with another specimen of beautiful crystalline appearance, I obtained considerably greater numbers for the 
specific beat. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 16 0, 3-16°-6. 
T. 
T'. 
t'. 
t. 
M. 
TO. 
/- 
y- 
X. 
sp. H. 
0 
O 
o 
o 
grms. 
grms. 
grm. 
grm. 
53-0 
18-5 
18-23 
15-72 
26-975 
9-805 
1-72 
0-431 
0-651 
0-0582 
51-5 
18-4 
18-14 
15-76 
26-96 
„ 
„ 
„ 
}> 
0-0557 
52-0 
18-4 
18-13 
15-73 
26-99 
„ 
„ 
„ 
„ 
0-0546 
51-6 
18-5 
18-16 
15-81 
26-97 
1-70+ 
„ 
,, 
0-0542 
But the Naphtha which bad been in contact with this cinnabar, left on evaporation a considerable quantity of 
sulphur, the admixture of which made the specific beat too large, 
f After drying the stopper. 
