in Voltaic Action . 
59 
In the preceding the grade of increment from the negative to 
the positive pole is remarkably uniform. Towards the centre of 
the individual trough, the maximum still obtains. The last cell 
at the copper pole is decidedly the minimum, being only 101° 
Fahr., while that of the zinc pole is 1ST Fahr., a difference of 
31° Fahr. 
The experiments which succeed were made on the 6th Octo- 
ber 1823, air 63°, diluted acid in cells before immersion of the 
plate 64°.5 Fahr. 
So soon as the plates were plunged into the cells, 
Zinc end (positive ). 1st Trough 69°, Centre 66°, End 67° 
2d 70 , 08 , 75 
3d — 80 , 75 , 75 
4th 94 , — — 86 , 84 Copper ( negative.) 
Before the action is fairly determined, the above experiments 
prove the negative end to sustain the maximum of temperature, 
being 84°, while the positive end is 69°. 
Before removal of the plates, when the acid had become weak, 
Zinc (positive). 1st Trough 126°, Centre 125°, End 124° 
2d 
126 , 
130 , 
— - 126 
3d 
124 
128 
130 
4th 
XJ3I , 
124 , 
122 , 
- — - 120 Copper ( negative. ) 
Here, as in former experiments, the maximum is at the zinc, 
the uniformity already named being remarkably sustained. 
After removal of the plates the indications of temperature 
were as follows. 
1st Trough. 
( Zinc or positive.) 
Cell 1, 122° F. 
2, 124 
3, 126 
4, 126 
5, 126 
6, 125 
7, 124 
8, 123 
9, 120 
10, 120 
4th Trough. 
F. Cell 1, 121° F. 
2 , 122 
3, 122 
4, 122 
5, 121 
6, 119 
7, 116 
8, 116 
9, 116 
10, 116 
Copper or negative. 
Several queries seem naturally to spring from these facts. 
Does the excited electricity thus modify the distribution of 
heat ? or, Does the chemical action of the acid on metals of dif- 
ferent conducting powers produce the unequal balance ; and is 
electricity the consequence of this unequal distribution ? 
The action of electricity may either give rise to an unequal 
2d Trough . 
Cell 1, 122° F. 
2, 124 
3, 125 
4, 126 
5, 126 
6, 128 
7, 127 
8, 126 
9, 124 
10, 122 
3f/ Trough. 
Cell 1, 121° 
2, 122 
3, 124 
4, 125 
5, 125 
6, 125 
7, 125 
8, 125 
9, 129 
10, 126 
