98 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
Experiments with Glass 3. Temperature of the Air 19°*0. 
T. 
T'. 
t'. 
t. 
M. 
/• 
X. 
sp. H. 
O 
0 
O 
o 
grms. 
grms. 
grm. 
46*8 
21*1 
20*76 
17*03 
26*95 
3*445 
0*453 
1*004 
46*8 
21*1 
20*83 
17*12 
26*985 
0*999 
47*0 
21*2 
20*93 
17*22 
26*935 
3*435* 
55 
0*996 
The value found for the specific heat of the contents of the glass comes very near the 
number 1, assumed for the specific heat of water f. 
Determinations in which mercury was contained in the glass gave the following results 
for the specific heat of the contents of the glass. 
Experiments with 
Glass 1. 
Temperature of the Air 13°*8-14 
°*4. 
T. 
T'. 
a. 
t. 
M. 
/• 
X . 
sp. H. 
o 
51*1 
16*8 
16*50 
13*41 
grms. 
26*945 
grms. 
53*015 
grm. 
0*651 
0*0335 
48*5 
16*8 
16*48 
13*64 
26*95 
55 
55 
0*0333 
45*2 
16*5 
16*20 
13*63 
26*965 
55 
55 
0-0333 
Experiments with Glass 2. 
Temperature of the Air 13 0, 8-14 0 * 
4. 
T. 
T'. 
t'. 
t. 
M. 
/• 
X. 
sp. H. 
50*0 
O 
171 
16*79 
13*74 
grms. 
26*935 
grms. 
60*015 
grm. 
0*487 
0*0335 
4 
45*6 
16*7 
16*41 
13*72 
26*935 
55 
55 
0*0337 
The mean of these five determinations gives 0*0335 for the specific heat of mercury, 
in accordance with the results found by other observers for this metal (0*0330 between 
0° and 100°, Dulong and Petit; 0*0333, Regnault). 
26. For the liquid which is to be placed in the glass along with the substance whose spe- 
cific heat is to be investigated, I could in many cases use water ; but many substances, the 
* After drying the stopper. 
t In § 24 it was mentioned that the numbers obtained for the specific heat of the contents of the glass are 
somewhat too small, if the maximum temperature of the water in the calorimeter, t', exceeds the temperature of 
the air by much more than 2°. As an example I give the following determinations, in which the glass used 
contained water. 
Experiments with Glass 1. Temperature of the Air 13°-5-13°-8. 
T. 
T'. 
t'. 
t. 
M. 
/- 
X. 
sp. H. 
0 
0 
o 
o 
grms. 
grms. 
grm. 
46-5 
18-1 
17-81 
13-64 
26-94 
3-40 
0-651 
0-976 
43-9 
16-7 
16-38 
12-33 
26-955 
» 
» 
0-989 
Experiments with Glass 2. 
Temperature of the Air 13°-5-13°*8. 
T. 
T'. 
t'. 
t. 
M. 
/• 
X. 
sp. H. t 
O 
O 
0 
0 
grms. 
grms. 
grm. 
49-1 
18-3 
18-03 
13-37 
26-94 
3-66 
0-487 
0-981 
47-6 
18-3 
18-04 
13-66 
26-99 
„ 
„ 
0-969 
47-0 
17*5 
17-22 
12-73 
26-97 
3-65* 
„ 
0-991 
* After drying the stopper. 
