PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
131 
Tungstic Acid , W 0 3 . Yellow powder. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 19 o, 5-20°T. 
T. T'. t'. t. M. m. f. y. x. sp. H. 
o o o o grms. grms. grm. grm. 
52T 21-3 21-02 18-60 26-98 6*89 1-965 0-431 0-651 0-0902 
52-8 21-5 21-16 18-73 26-99 „ „ „ „ 0-0868 
50- 5 21-4 21-14 18-84 26-965 „ „ „ „ 0-0919 
51- 9 21-6 21-29 18-93 26-985 „ 1-95* „ „ 0-0886 
Mean . . . 0-0894 
Of the above pulverulent metallic acids only small quantities were used, and their 
thermal action was only a small proportion of the whole thermal action observed. The 
results can only be considered as approximations to the true specific heat. 
50. Chloride of Sodium, Na Cl. Pure chloride of sodium fused. 
Experiments with Naphtha A. Glass 1. Temperature of the Air 10 o "9-ll°-5. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• 
y- 
X. 
sp. H. 
O 
o 
0 
o 
grms. 
grms. 
grm. 
grm. 
45-8 
12-3 
11-97 
9-34 
26-91 
3-65 
1-57 
0-431 
0-651 
0-215 
45-5 
12-7 
12-44 
9-88 
26-94 
55 
55 
,, 
0-212 
45-7 
13-0 
12-74 
10-20 
26-99 
55 
1-56* 
55 
„ 
0-212 
Mean . . . 0-213 
Almost clear pieces of rock-salt, sharply dried. 
Experiments with Naphtha A. Glass 2. Temperature of the Air 10°-9-ll°-5. 
T. 
T'. 
t'. 
t. 
M. 
m. 
/• y- 
X . 
sp. H. 
o 
0 
0 
o 
grms. 
grms. 
grms. 
grm. 
44-8 
12-6 
12-32 
9-63 
26-95 
3-955 
2-025 0-431 
0-487 
0-225 
45-8 
13-0 
12-73 
10-04 
26-935 
55 
55 55 
55 
0-214 
44-6 
13-3 
13-01 
10-43 
26-95 
55 
2-015 * „ 
Mean 
” 
0-219 
0-219 
Chloride of Potassium, K Cl. Pure salt fused f . 
I. — Experiments with Naphtha A. Glass 2. Temperature of the Air 12°T-12°-2. 
T. T'. t'. t. M. m. f. y. x. sp. H. 
o o o o grms. grms. grm. , grm. 
46-3 14-0 13-73 11-24 26-98 3-665 2-265 0-431 0-487 0-168 
45-7 14-2 13-86 11-44 26-99 „ „ „ „ 0-167 
* After drying the stopper. 
t These experiments with fused chloride are more trustworthy than those with crystallized salt, which, 
however, are very near ; for the latter, in loose crystals, only in small quantity, filled the glass used in the 
determinations. The experiments with sharply dried crystallized chloride of potassium gave the following 
results : — 
