( 57 ) 
Art. X. — 1. On the Unequal Distribution of Caloric in Vol- 
taic. Action. 2. On the Temperature of the Skin of the 
Dormouse. 3. On the Temperature of the Egg of the Hen, 
in relation to its Physiology. By John Murray, F. S. A. 
F.L.S. & M.W.S. Communicated by the Author. 
1 . On the Unequal Distribution of Caloric in Voltaic Action. 
The following experiments may, I hope, be found interest- 
ing, and eventually throw light on the more obscure features of 
galvanic action, while the thermo-electric phenomena of See- 
beck, Dessaignes, Moll, Van Beeck, &c. may be elucidated. 
Even the occult meteorology of the thunder-storm may find 
facts amid experiments such as these are, that may ultimately 
conduct to a happier theory. 
Four galvanic troughs were employed. They were construct- 
ed in the triad form, on the principles of Dr Wollaston; and 
the^ cells containing the acid were of porcelain. Each trough 
had 10 triads, and the plates were 4 inches square. 
I used 1| oz. of nitrous acid for each compartment, and filled 
up with water. About 6 inches of platinum wire, / 5 th inch 
diameter, were ignited, &c. 
Air 66 c 
5 Fahr 
. ; water in room 64 
°. 2d 
September 1823. 
First Trough. 
Zinc end — positive. 
Second 
Trough. 
Cent. 
Temp. 
99° F.] 
Cell 1. 
Temp. 
99° F.' 
2. 
102 
£ ° 
2. 
100 
S o 
3. 
104 
.5 co 
3. 
102 
’3 • 
4. 
5. 
106 
108 
1 S 
S3 3 
4. 
5. 
102 
102 
.3 _ 
s a 
S3 3 
6. 
110 
r 8 9 
6. 
99 
r g a 
7- 
111 
1 * 
7. 
97 
£‘9 
8. 
112 
% a 
8. 
95 
rj 
3= a 
9. 
110 
ssn; 
9. 
93 
10. 
108 
• rH W 
ft 
10. 
91 
ft ^ 
Third Trough . 
Fourth ! 
Trough. 
Cell 1. 
Temp. 
101° F0 
3 
Cell 1. 
Temp. 
100° F.' 
!-• 
2. 
104 
2. 
102 
a? 
3. 
106 
It. 
3. 
103 
• 3 50 
4. 
108 
S S' 
4. 
104 
a s' 
5. 
108 
S3 3 
5. 
103 | 
L a a 
6. 
108 
r 8 9 
6. 
101 
r 8.1 
7- 
106 
*9 
7. 
100 
8. 
105 
0) rj 
32 3 
8. 
100 
.2 9 
9. 
103 
9. 
99 
10. 
101 , 
fa * 
10. 
- 
98 
ft * 
Copper or negative termination 
or pole . 
