PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
163 
temperatures near their melting-points, so also with sesquichloride of carbon at a 
temperature of 50° (that is more than 100° from its melting-point), the specific heat 
(or rather the number which is obtained for this in determinations) rapidly and con- 
siderably increases. From the last two series of experiments the specific heat of sesqui- 
chloride of carbon is 
Between 
18° and 37°. 
Mean of experiments: a . . . 0172 
' „ b . . . 0-183 
Between 
18° and 43°. 
0193 
0195 
0-194 
Between 
18° and 50°. 
0-275 
0-279 
0-277 
Average 0*178 
The specific heat of sesquichloride of carbon increases much more between 43° and 
50° than between 37° and 43°. It may be assumed that for temperatures below 37° the 
number found, 0-178, comes very near the true specific heat of this compound, that is, 
uninfluenced by heat of softening. 
78. Cane-sugar , G 12 H 22 0 u . Dried crystalline fragments of clear sugarcandy. 
Experiments with Naphtha A. Glass 3. Temperature of the Air 20 o, 6. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
O 
O 
o 
o 
grms. 
grms. 
grm. 
grm. 
49-9 
22-2 
21-93 
19-75 
26-96 
3-165 
1-625 
0-431 
0-453 
0-306 
51-4 
22-6 
22-26 
20-03 
26-94 
55 
95 
95 
„ 
0-295 
51-4 
22-6 
22-30 
20-05 
26-965 
55 
1-62* 
95 
55 
0-302 
Mean . . . 0-301 
Fine loaf-sugar was recrystallized from water, the mother-liquor washed off with 
dilute alcohol, the pure white crystals dried at 100°. They gave the following results. 
Experiments with Naphtha B. Glass 1. Temperature of the Air 18°'5-18°*7. 
T 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X, 
sp. H. 
O 
O 
0 
o 
grms. 
grms. 
grm. 
grm. 
51-5 
20-9 
20-62 
18-16 
26-945 
2-915 
1-54 
0-419 
0-651 
0-299 
51-6 
20-7 
20-43 
17-95 
26-95 
„ 
59 
55 
„ 
0-297 
50-3 
20-6 
20-33 
17-94 
26-985 
55 
1-52* 
„ 
59 
0-303 
Mean . . . 0-300 
I also examined amorphous cane-sugar. Crystals dried at 100°, as used in the pre- 
ceding experiment, were melted in an oil-bath at 160°-170°, and the fused mass allowed 
to cool in the closed tube. The resultant amorphous amber-like viscous mass, exactly 
resembling colophony, was comminuted (as rapidly as possible to avoid the absorption 
of moisture), and gave the following results. 
After drying tlie stopper. 
