PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
119 
Experiments with Naphtha A. Glass 3. Temperature of the Air 19°*8-19°T. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X . 
sp. H. 
0 
o 
0 
o 
grm. 
grms. 
grms. 
grm. 
51-2 
21-6 
21*34 
18*96 
26*965 
6*725 
2*405 
0*431 
0*453 
0*101 
51*2 
21-6 
21*33 
18*95 
26*97 
55 
„ 
„ 
0*101 
50-8 
21-5 
21*24 
18*92 
26*945 
55 
55 
„ 
„ 
0*096 
51*8 
21-5 
21*22 
18*81 
26*99 
55 
2*36 * 
„ 
„ 
0*101 
As the atomic weight of chromium is somewhat smaller than that of iron, it is to be 
supposed that the specific heat of chromium is somewhat greater than that of iron. 
Aluminium : a piece of a small bar f. 
Experiments with Naphtha A. Glass 3. Temperature of the Air 18°*6-18°*4. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
0 
O 
0 
o 
grms. 
grms. 
grm. 
grm. 
52*3 
20*9 
20*64 
18*03 
26*98 
5*916 
1*45 
0*431 
0*453 
0*197 
51*9 
20*7 
20*44 
17*83 
26*995 
55 
55 
55 
„ 
0*200 
52*2 
20*9 
20*62 
17*95 
26*97 
55 
55 
55 
55 
0*207 
51*0 
20*8 
20*47 
17*93 
26*975 
55 
1*435 
* 
55 
55 
0*202 
Mean . . . 0-202 
42. Remisulphide of Copper, €u 2 S$. Copper-glance was investigated ; a dense spe- 
cimen with conchoidal fracture from Liberty Mine in Maryland and a crystallized 
specimen of unknown locality, which also I tested as to its purity. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 16 0, T. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
52*6 
19*0 
18*72 
15*74 
grms. 
26*995 
grms. 
8*775 
grm. 
1*595 
0*431 
grm. 
0-651 
0*120 
52*0 
18*9 
18*58 
15*65 
26*995 
55 
55 
„ 
55 
0*120 
52*6 
19*0 
18*72 
15*74 
26*99 
55 
55 
55 
55 
0*120 
51*6 
18*8 
18*53 
15*63 
26*96 
„ 
1*58 * 
55 
55 • 
0*120 
Mean . . . 0*120 
* After drying the stopper. 
t “ By remelting Paris aluminium, by which, it became poorer in iron ; contains probably still some iron 
and silicium.” — Wohler. 
+ All formulae of compounds whose specific heat is discussed in the following are written under the assump- 
tion of the new atomic weights (see § 2). 
MDCCCLXV. 
S 
