148 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
Chrysolite , Mg^. -Fe^. Si0 4 *. From Dockweiler in the Eifel. Transparent to trans- 
lucent bright green crystalline fragments. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 19 0, 2-19°-5. 
T. 
T. 
t'. 
t. 
M. m. f. 
y • 
so. 
sp. H. 
G 
grms. grms. grm. 
grm. 
5P3 
21-4 
21-14 
18-53 
26-985 5-84 1-475 
0-431 
0-657 
0-183 
50-4 
21-4 
21-13 
18-55 
26-965 „ 
55 
55 
0T91 
50-9 
21-5 
21-17 
18-54 
26-985 „ 
55 
9? 
0-193 
50-9 
21-5 
21-16 
18-55 
26-96 
55 
0-189 
49-9 
21-4 
21-13 
18-63 
26-975 „ l-45f 
„ 
99 
0-187 
Mean 
0-189 
Olivine , Mg* » Fe^ Si 0 4 J, 
, From 
a spheroidal mass surrounded by lava from the Eifel. 
Experiments with Naphtha A. 
Glass 1. Temperature of the Air 19 0, 
0-19°-6. 
T. 
T'. 
t'. 
t. 
M. m. /. 
y- 
X , 
sp. H. 
0 
o 
0 
o 
grms, grms. grm. 
grm. 
51-5 
21-6 
21-26 
18-53 
26-975 6-37 1-425 
0-431 
0-651 
0-188 
51-4 
21*3 
-20-97 
18-22 
26-975 
,, 
59 
0-188 
51-5 
21-6 
21-25 
18-52 
26-975 „ 
55 
0T88 
52-1 
21-8 
21-52 
18-72 
26-97 „ 1-41 f 
„ 
99 
0-194 
Mean 
0-187 
65. Wollastonite, 
€a Si G ; 
5 . Pure 
j pieces of Wollastonite from Finnland. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 17°*2. 
T. T'. 
t'. t. 
M. 
m. f. 
y. x. 
sp. H. 
O O 
o o 
grms. 
grms. grm. 
grm. 
51-0 19-4 
19-12 16-33 
26-955 
5-31 1-81 
0-431 0-651 0-179 
50-5 19-1 
18-76 16-01 
26-945 
5-9 5 9 
55 55 
0-175 
50-0 19-2 
18-92 16-19 
26-98 
95 95 
55 55 
0-181 
50-7 19-4 
19-13 16-40 
26-97 
l-785f „ 
0-176 
Mean . . 
. 0-178 
* An analysis by Professor Knop gave tbe 
following 
results, which are collated with the numbers required 
by the above formula 
SiO s . 
MgO. 
FeO. 
Ah0 3 . 
Total. 
Found 
40-95 
50-82 
8-83 
trace 
100-60 
Calculated 
.... 41-15 
49-87 
8-98 
39 
100-00 
t After drying the stopper. 
t This olivine has 
the same composition 
as the above chrysolite. 
Professor Knop found for this olivine 
the following numbers, which are compared with those required by the above formula 
Si0 2 . 
MgO. 
FeO. 
A1 2 0 3 . 
Total. 
Found ... 
41-85 
49-10 
8-75 
trace 
99-70 
Calculated 
.... 41-15 
49-87 
8-98 
100-00 
