PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
125 
46. Sesquioxide of Iron , Ee 2 0 3 . Crystals and crystalline pieces of specular iron 
from St. Gotthard. 
I. — Experiments with Naphtha A. Glass 1. Temperature of the Air 12°*4-12 0, 3. 
T. 
T'. 
t'. 
t. 
M. 
M. 
/• 
y- 
x. 
sp. H. 
Q 
grms. 
grms. 
grm. 
grm. 
47-0 
14-8 
14-47 
11-38 
26-97 
7-51 
1-74 
0-431 
0-651 
0-158 
46-4 
14-7 
14-43 
11-43 
26-975 
33 
33 
55 
33 
0-153 
45-8 
14-7 
14-44 
11-52 
26-925 
„ 
„ 
„ 
„ 
0-150 
45-8 
15-0 
14-73 
11-83 
26-98 
33 
1-72* 
„ 
33 
0-153 
Mean 
0-154 
II.- 
-Experiments with Water. Glass 1. 
Temperature of 
the Air 
19°-5. 
T. 
T. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
0 
O 
0 
0 
grms. 
grms. 
grm. 
grm. 
44-1 
21-5 
21-17 
17-81 
26-97 
8-845 
1-935 
1-000 
0-651 
0-161 
43-6 
21-6 
21-26 
18-01 
26-985 
33 
33 
33 
55 
0-158 
42-5 
21-5 
21-23 
18-12 
26-985 
„ 
33 
55 
0-159 
42-8 
21-6 
21-33 
18-22 
26-98 
33 
1-92* 
33 
„ 
0-157 
Mean 
0-159 
The specific heat of specular iron between 18° and 45°, according to these determi- 
nations, is 0T57, the mean of the averages of both series of experiments 0T54 and 
0-159. 
Iserine, Ee 6 Ti 3 0 3 f . Indistinct crystalline grains from the Iserwiese in the Riesenge- 
birge. 
Experiments with Naphtha A. Glass 2. Temperature of the Air 14 0, 2-13 0 '8. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
x. sp. H. 
o 
o 
0 
o 
grms. 
grms. 
grm. 
grm. 
46-6 
17-1 
16-77 
13-43 
26-975 
11-145 
1-415 
0-431 
0-487 0-176 
47-0 
16-7 
16-43 
12-97 
26-98 
33 
„ 
33 
,, 0-178 
46-5 
16-6 
16-33 
12-93 
26-93 
33 
33 
33 
„ 0-176 
47-0 
16-9 
16-56 
13-15 
26-98 
33 
1-39 * 
33 
Mean 
„ 0-177 
. . . 0T77 
* After drying the stopper. 
f This formula corresponds to the composition assumed by Rammelsberg (Handbuch der Mineralchemic, 
pp. 413, 1015) for iserine from the Iserwiese, namely, 3 (FeO Ti 0 2 )+Fe 3 0 3 . 
