ADDITION, _12th August, 1772,_

_In Consequence of the Experiments and Discoveries made in France

by Mr. Walsh, and communicated by him to Dr. Franklin._

Let several persons, standing on the floor, hold hands, and let one

of them touch the fish, so as to receive a shock. If the shock be

felt by all, place the fish flat on a plate of metal, and let one of

the persons holding hands touch this plate, while the person farthest

from the plate touches the upper part of the fish with a metal rod:

then observe, if the force of the shock be the same as to all the

persons forming the circle, or is stronger than before.

Repeat this experiment with this difference: let two or three of the

persons forming the circle, instead of holding by the hand, hold each

an uncharged electrical bottle, so that the little balls at the end

of the wires may touch, and observe, after the shock, if these wires

will attract and repel light bodies, and if a ball of cork, suspended

by a long silk string between the wires, a little distance from the

bottles, will be alternately attracted and repelled by them.

The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 1 [of 3] · 第 243 / 291 题