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 . . . . immediately after discharge.

1211.  The transferable charge being 148 deg. — 5 deg., its half is 71 deg..5, which is not far removed from 70 deg., the half charge of i.; or from 73 deg., the half charge of ii.:  these half charges again making up the sum of 143 deg., or just the amount of the whole transferable charge.  Considering the errors of experiment, therefore, these results may again be received as showing that the apparatus were equal in inductive capacity, or in their powers of receiving charges.

1212.  The experiments were repeated with charges of negative electricity with the same general results.