separated from each other; app. ii. is next quickly
to be measured by the carrier, then app. i.; lastly, ii. is to be
discharged, and the discharged carrier applied to it to ascertain whether
any residual effect is present (1205.), and app. i. being discharged is
also to be examined in the same manner and for the same purpose.

1208. The following is an example of the division of a charge by the two
apparatus, air being the dielectric in both of them. The observations are
set down one under the other in the order in which they were taken, the
left-hand numbers representing the observations made on app. i., and the
right-hand numbers those on app. ii. App. i. is that which was originally
charged, and after two measurements, the charge was divided with app. ii.

App. i. App. ii.
Balls 160 deg.

. . . . 0 deg.
254 deg. . . . .
250 . . . .
divided and instantly taken
. . . . 122
124 . . . .
1 . . . . after being discharged.
. . . . 2 after being discharged.

1209. Without endeavouring to allow for the loss which must have been
gradually going on during the time of the experiment, let us observe the
results of the numbers as they stand. As 1 deg. remained in app. i. in an
undischargeable state, 249 deg. may be taken as the utmost amount of the
transferable or divisible charge, the half of which is 124 deg..5. As app. ii.
was free of charge in the first instance, and immediately after the
division was found with 122 deg., this amount _at least_ may be taken as what
it had received. On the other hand 124 deg. minus 1 deg., or 123 deg., may be taken as
the half of the transferable charge retained by app. i. Now these do not
differ much from each other, or from 124 deg..5, the half of the full amount of
transferable charge; and when the gradual loss of charge evident in the
difference between 254 deg. and 250 deg. of app. i. is also taken into account,
there is every reason to admit the result as showing an equal division of
charge, _unattended by any disappearance of power_ except that due to
dissipation.

1210. I will give another result, in which app. ii. was first charged, and
where the residual action of that apparatus was greater than in the former
case.

App. i. App. ii.
Balls 150 deg.

. . . . 152 deg.
. . . . 148
divided and instantly taken
70 deg. . . . .
. . . . 78
. . . . 5 immediately after discharge.
0 . . . .