392 Experiments with Grove’s Battery. 
Table of Results. 
uy pairs oe 2 _ ve and — 9 = 
A 4 
oc tc 6 “ec ce 14 3 “ 
“c a4 8 te c ce 24 cc 
6c te 10 74 6c 74 24 “ 
ait each successive addition of two miles up to thirty-three, still 
eave an attractive and lifting power of one-eighth of an ounce. 
Curve ee e a: 
Og PN Sed ee 8 9 
i al. su | i. | 1 te ra By i fe 4 t ‘ Ps ia 2 i | i ‘ 1 | 1 | 1 a 
& os -F tt Ses hee Sahat face. d L 
2 NR OS : 
d 
A great irregularity is seen between 
the 10th and 12th mile, which is due 
undoubtedly to a deficiency of accura- 
20 cy in the weighing apparatus. Os 
99 I take pleasure in sending you the 
on following calculation of the law of the 
s conducting power of wires, for which 
. I am indebted to my friend Prof. Dra- 
_— * per, of the New York City University. 
1 a r 
32 
33 
On ihdiniul the weeding ane alus as te towe Dae 
ona, M. D., &e.dcen. 
It has often been objected, thar if the conducting power of 
wires for electricity was inversely as their length, and directly aS 
as their section, the transmission of telegraphic signals through 
