364 On Electricity. 
trometer being withdrawn, the leaves still retained their diver- 
gence. 
Exp. 3.—The electrometer was placed in contact with the 
glass tube near to the negative extremity of the column. The 
results were precisely the same as in the two preceding experi- 
ments, except that in this the divergence of the leaves was less 
than in those. 
Exp. 4.—The electrometer was now put in contact with the 
waxed end of the glass tube next to the brass mounting at the 
positive extremity of the column. Ina few seconds the leaves 
just separated with positive electricity, but the electrometer be- 
ing withdraw n, they closed. As the teaves were thus found to 
be. only influentially affected,the electrometer was replaced in its 
position ; and after the space of a few minutes the leaves di- 
verged something more than { of an inch: the electrometet 
being withdrawn, the leaves remained positively electrified. 
Exp. 5.—The electricity of the waxed end of the tube next 
to the brass mounting at the negative extremity of the column 
was next ascertained. The leaves at first were only influentially 
affected ; but after the contact had been continued for several 
minutes, they remained positively electrified. 
Exp. 6.—The negative extremity of the column was now in- 
sulated as well as the positive. The same places of the column 
were examined as before, and the results were similar to the 
preceding ; the only difference being that the divergence of the 
leaves was much less than in the former instances. 
Exp. 7.—The column was now taken and exposed to the 
fire for about three minutes, in order to dissipate all the mois ure 
from its surface; it was then placed as in Experiment 1. and 
the electrometer applied to the different points in the manner 
already described. The kind of electricity found at each point 
was as before positive ; and now in no instance was any electri- 
city communicated to the leaves, which diverged only while the 
electrometer was in contact with the column ; their divergence 
was very small. I am, gentlemen, 
Your obedient and obliged servant, 
To Messrs. Nicholson and Tilloch. Tuomas. How.tpy. 
LXXVII. On Electricity: in Answer to Mr. Sinczr’s Re- 
marks. By Ez. WALKER, Esq. 
; Lynn, May 18, 1814. 
Sirs, — Ma. Stncer ‘still maintains that I have fallen into 
error, in my experiments on inducted electricity, and has ad- 
vanced three statements to prove it*. 
* Phil. Mag. vol. xlili, p, 20. 
The 
