150 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
66. Borate of Soda, Na 2 B 4 0 7 . Beautiful transparent vitreous pieces of fused borax. 
Experiments with Naphtha A. Glass 2. Temperature of the Air 14 0, 4. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
O 
0 
o 
o 
grms. 
grms. 
grms. 
grm. 
46-6 
16-6 
16"33 
13-67 
26-95 
4.475 
2-005 
0-431 
0-487 
0-232 
46-8 
16-6 
16-33 
13-65 
26-98 
99 
99 
„ 
0-233 
46-5 
16-6 
16-33 
13-73 
26-965 
99 
,, 
0-222 
46-6 
16-8 
16-54 
13-93 
26-945 
99 
1-99* 
„ 
,, 
0-227 
Mean . . . 0-227 
Hydrated Borate of Soda, Na 2 B 4 0 7 +lO H 2 0. Crystallized borax dried in the air. 
Experiments with Naphtha A. Glass 3. Temperature of the Air 16°-3-16 0- 5. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/■ 
y • 
X. 
sp. H. 
50-9 
18-7 
18-43 
15-43 
grms. 
26-98 
grms. 
3-38 
grm. 
1-745 
0-431 
grm. 
0-453 
0-387 
50-3 
18-4 
18-13 
15-15 
26-95 
99 
99 
99 
0-388 
49T 
18-5 
18T6 
15-33 
26-96 
99 
99 
99 
99 
0-381 
49-5 
18-8 
18-45 
15-61 
26-945 
99 
1-73* 
99 
99 
0-383 
Mean . . . 0-385 
67. Tungstate of Lime, Ca W0 4 . Crystals of Scheelite from Zinnwald in Bohemia. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 16°-7-16°-4. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• y- 
X. 
sp. H. 
o 
o 
o 
o 
grms. 
grms. 
grm. 
grm. 
50-3 
19-3 
19-00 
16-27 
26-96 
11-575 
1-34 0-431 
0-651 
0-0990 
49-5 
19T 
18-84 
16-22 
26-96 
99 
99 99 
99 
0-0946 
50-5 
19-0 
18-71 
15-94 
26-97 
99 
99 99 
99 
0-0988 
48-6 
19-0 
18-66 
16-12 
26-99 
99 
1-325* „ 
99 
0-0945 
Mean . . . 0-0967 
Wolfram, Fe§ Mn* W0 4 f. Fragments of crystals from Altenberg in the Erzgebirge. 
Experiments with Naphtha B. Glass 1. Temperature of the Air 19°T-19°-0. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
0 
o 
0 
o 
grms. 
grms. 
grm. 
grm. 
52-1 
21-1 
20-83 
18T4 
26-985 
11-455 
1-525 
0-419 
0-651 
0-0918 
52-9 
21-2 
20-92 
18-14 
26-975 
5? 
99 
99 
99 
0-0939 
54-0 
21-2 
20-92 
18-04 
26-97 
99 
0-0941 
54-8 
21-4 
21-13 
18-23 
26-945 
„ 
1-51* 
99 
99 
0-0921 
Mean . . . 0-0930 
*■ After drying the stopper. 
t According to Kerndt’s analysis of. the wolfram of Altenberg (Rammelsberg’s ‘ Handbuch der Mineral. 
Ohemie,’ p. 308). 
