1John Canton: Electrical Experiments, 6 December 1753 (Franklin Papers)
Printed in The Royal Society, Philosophical Transactions , XLVIII , pt. 1 (1753), 350–8. Experiment 1. From the cieling, or any convenient part of a room, let two cork-balls, each about the bigness of a small pea, be suspended by linen threads of eight or nine inches in length, so as to be in contact with each other. Bring the excited glass tube under the balls, and they will be separated by...