FINIS.
| [1] | Dr. Gowin Knight, F. R. S. |
| [2] | I call Electrics per se or originally-electrics, those Bodies, in which an attractive Power towards light Substances is easily excited by Friction; such as Glass, Amber, Sulphur, Sealing-wax, and most dry Parts of Animals, as Silk, Hair, and such like. I call Non-electrics or Conductors of Electricity, those Bodies, in which the above Property is not at all or very slightly perceptible; such as Wood, Animals living or dead, Metals and vegetable Substances. See Gray, Du Fay, Desaguliers, Wheler, in the Philosophical Transactions. |
| [3] | Page [6]. |
| [4] | I have constantly observed, that the electrical Attraction through Glass is much more powerful, when the Glass is made warm, than when cold. This Effect may proceed from a two-fold Cause: First, warm Glass does not condense the Water from the Air, which makes the Glass, as has been before[[5]] demonstrated, a Conductor of Electricity: secondly; As heat enlarges the Dimensions of all known Bodies, and consequently causes their constituent Parts to recede from each other, the electrical Effluvia, passing in straight Lines, find probably a more ready Passage through their Pores. |
| [5] | Page [13]. |
Transcriber's note:
All footnotes moved to the end of the text.