114. Hare’s New Galvanic Apparatus, Theory, &c. 
have not acted well without insulation,* was becatise 
bs See ric could retrocede in the negative, as well as 
the positive direetion. I will now add, that 
igdependerity of be greater effect produced by the simal- 
taneous immersion of my eighty coils, their power is im- 
proved by the Heide rant of the surfaces, which are only 
about an eighth of an inch asunder 5 sO. that the circulation 
may go on more rapi 
Pursuant to the doctrine, whied supposes the same icine 
tity of electricity, varying in intensity in ratio of the 
number of | pairs to the quantity of surface, to: be the sole 
agent in galvanic ignition, the electrical fiid as evolved by 
Sir H. Davy’s great pile, must have been nearly two thou- 
sand times more intense, than as evolved by a single pair, 
yet it gives sparks at no greater distance than the thirtieth or 
fortieth of an inch: ‘The intensity of the fluid must be at 
least as much greater in one instance, than in another, as the 
sparks. produce ed by it are longer. A fine electrical plate 
of thirty wo- inches diameter, will give sparks at 
ten iat nthe OF: “course the intensity” of the fluid which it 
Aes must be three Hundred times greater than that emit- 
by two thousand pairs. The intensity produced by 4 
single pair, must be two thousand times less than that produ- 
ced by a the great pile, and of course six hundred thousand 
times less than that produced by a good electrical plate of 
thirty two inches. Yet a single pair of about a's foot in 
area, will certainly deflagrate more wire, than alike extent A 
coated | rface charged by such a 1 plate. ems to Sing- 
coated fie ak to destroy watch pendulum wire 5 a larger w wire 
may be burned off bya galvanic battery of a foot square. 
But agreeably to the hypothesis in dispute, it compensates 
by quantity, for the want of intensity. Hence the quantity 
of fluid in the pair is six hundred thousand times greater, 
while its intensity is six hundred thousand times less ; and 
vice versa of the coated surface. Is not this absurd? What 
does intensity mean as applied to a fluid? Is it not expres- 
sed by the ratio of quantity, to space ? If there be twice as 
touch ety —— one oubic inch, as ease seers 
* That tas w ith the same mass of cone ting: uid tn 
instead of being divided into. sth aon: vortions, an it 
its action to one copper and one zinc plate 
