274 Description of two new Voltaic Batteries. 
lation to this power, to ant of the instruments a and 
certainly superior in n point of convenience either to the coil 
of Colonel Offerhaus,* or that of Mr. Pepys. Sie it is ne- 
cessary, however, to have instruments capable of producing 
the other galvanic effects, it occurred to me to form a bat- 
tery of small plates upon the above plan. Fig. 5 represents 
one of this kind, with semi-circular plates, eight inches in ¥ 
diameter, and arranged as in the large apparatus. ‘This is 4 
four feet in length, and contains one hundred and forty-four j 
Sr — forty-eight of zinc and ninety-six of copper. 
e placed parallel to each other, I have chosen 
to connect by an are of thick brass wire at one end and at 
the other by having plates of copper connected with the 
terminating ‘plates inside, fixed to the outside of the wheels, " 
as ate, with a sheath to each to receive the ends of the con- 
ductors, as in fig. 6. Iam preparing another battery « of this 
in , with a much larger number of small plates. o fa- 
one or more straps must be soldered to the edge of ea | 
plate, before they are fixed in their places, and then, by 
causing one strap to lap over the other, they can be easily 
united by the soldering tool. 
You will perceive my dear Sir, that according to the ar- 
rangement of both these instruments, we possess the advan- 
tage to be derived from the simultaneous immersion of all 
the plates, an dam which has been so ably illustrated 
by my friend Dr. Hare’s calorimotor and deflagrator, 
that by half a revolution of the wheels, which may | 
in a few seconds by a sli 
{ any dea ers 
cio obed’t humble serv’t, { 
ELISHA DE BUTTS. 
rgo Journa). Vol. VII. + Brande’s Journal, 1823, mn 
F ey. 
ae 
we 
