PEOFESSOE KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
167 
Crystallized Tartrate of Soda and Potass , G 4 H 4 Na K 0 6 + 4 H a 0. Fragments of 
transparent air-dried Seignette salt, which remained clear in the experiments made 
with them. 
Experiments with Naphtha B. Glass 1. Temperature of the Air 16°‘7-16°‘9. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y - 
X. 
sp. H. 
O 
O 
Ot 
o 
grins. 
grms. 
grm. 
grm. 
50-0 
19-0 
18-72 
16-03 
26-99 
3-385 
1-415 
0-419 
0*651 
0-324 
50-5 
18-8 
18-47 
15-68 
26-93 
„ 
yy 
yy 
0-333 
50-5 
18-9 
18-57 
15-82 
26-95 
yy 
yy « 
yy 
yy 
0-325 
50-4 
18-9 
18-61 
15-84 
26-965 
yy 
yy 
yy 
0-333 
50-5 
18-9 
18-57 
15-83 
26-965 
yy 
1 - 40 * 
yy. 
yy 
0-325 
Mean . . . 0-328 
Crystallized Acid Malate of Lime, € 4 H 4 Ca 0 a -f 0 4 H 6 0 5 + 8 H 2 O. Small crystals 
dried over sulphuric acid, which remained clear in the following experiments : 
T. 
o 
T'. 
o 
t'. 
o 
t. 
o 
M. 
grms. 
m. 
grms. 
f. 
grm. 
y- 
X. 
grm. 
sp. H. 
50-8 
19-4 
19-11 
16-55 
26-985 
2-76 
1-89 
0*419 
0-453 
0-346 
50-1 
19-5 
19-20 
16-73 
26-965 
yy 
yy 
yy 
„ 
0-337 
50-5 
19-6 
19-34 
16-84 
26-94 
yy 
yy 
„ 
0-339 
50-4 
19-6 
19-27 
16-82 
26-97 
yy 
1-865* „ 
Mean 
5) 
0-330 
0-338 
IY.— TABLE OF THE SUBSTANCES WHOSE SPECIFIC HEAT HAS BEEN 
EXPEEIMENTALLY DETEEMINED. 
81. In the following I give a summary of those solid substances of known composition 
for which there are trustworthy determinations of the specific heat. I have endea- 
voured to make this summary complete ; yet I have not thought it necessary to include all 
known determinations; for instance, all those referring to the metals most frequently 
investigated. But it appeared to me desirable to include completely the determinations 
of experimenters who have investigated a greater number of substances, in order to see 
how far the results obtained by different inquirers are comparable ; in inserting the 
numbers which I found for many substances of which the specific heats had been 
already determined by others, I had no other intention than that of offering criteria for 
judging how far these determinations are comparable, and 1 may be used for the con- 
siderations which are given in the fifth Division. 
The determinations given in the following summary are principally due to Dulong 
and Petit (D. P.), Neumann (N.), Regnault (R.), and myself (Kp.). There are besides 
some of Person (Pr.), of Alluard (A.), and the recent investigations of Pape (Pp.) are 
also included. By far the largest number of these detemiinations have been made by 
the method of mixture. A few only of the elements investigated by Dulong and Petit, 
mdccclxv. 
After drying the stopper. 
2 A 
