146 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
62. Carbonate of Lead, Pb C0 3 . Cerussite from Washington mine, Davidson county, 
North Carolina : beautiful clear crystals. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 13 0, 8. 
T. 
T'. 
t'. 
t. 
31. 
m. 
/• 
y* 
X. 
sp. H. 
49-2 
103 
16*03 
13-16 
grms. 
26-95 
grms. 
11-42 
grm. 
1-90 
0-431 
grm. 
0-651 
0-0772 
49-8 
16-0 
15-68 
12-72 
26-94 
55 
55 
55 
?? 
0-0779 
47-4 
15-9 
15-60 
12-80 
26-94 
55 
55 
55 
„ 
0-0810 
46-5 
15-9 
15-64 
12-94 
26-97 
55 
55 
55 
?> 
0-0797 
43-2 
15-8 
15-55 
13-14 
26-96 
„ 
1-885* 
?? 
0-0795 
Mean . . . 00791 
Carbonate of Lime , €a C0 3 . I have investigated both the rhombic and the rhom- 
bohedral modification. 
Arragonite. Fragments of clear crystals from Bilin, in Bohemia 
Experiments with Naphtha A. Glass 1. Temperature of the Air 13°*8. 
T. 
o 
T\ 
o 
t'. 
o 
t . 
o 
31. 
grms. 
m. 
grms. 
A 
grm. 
y- 
X. 
grm. 
sp. H. 
51-1 
16-8 
16-53 
13-25 
26-965 
6-445 
1-94 
0-431 
0-487 
0-195 
46-6 
16-0 
15-70 
12-73 
26-98 
?? 
55 
55 
?? 
0-201 
45-8 
16-1 
15-83 
12-94 
26-975 
?! 
55 
?? 
0-216 
44-0 
16-0 
15-74 
13-03 
26-965 
„ 
55 
55 
„ 
0-200. 
44-3 
15-9 
15-63 
12-86 
26-955 
?? 
1-92* 
55 
Mean 
?? 
0-204 
0-203 
Calcareous Spar. Cleavage pieces of transparent specimens from Auerbach, on the 
Bergstrasse. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 14°-4-14°-7. 
T. 
T'. 
t'. 
t. 
31. 
m. 
/■ 
y- 
cc. 
sp. H. 
o _ 
O 
0 
o 
grms. 
grms. 
grm. 
grm. 
49-5 
15-5 
15-24 
12-13 
26-98 
5-425 
1-48 
0-431 
0-651 
0-217 
49-6 
16-3 
15-96 
13-00 
26-96 
55 
55 
55 
0-204 
48-2 
16-1 
15-83 
12-94 
26-915 
55 
55 
55 
55 
0-209 
45-2 
16-2 
15-94 
13-42 
26-93 
55 
1-465* 
„ 
55 
0-195 
Mean . . . 0-206 
After drying the stopper. 
