Wonderful effect of points.--Positive and negative
electricity.--Electrical kiss.--Counterfeit spider.--Simple and
commodious electrical machine. 170
Observations on the Leyden bottle, with experiments proving the
different electrical state of its different surfaces. 179
Further experiments confirming the preceding observations.--Leyden
bottle analysed.--Electrical battery.--Magical Picture.--Electrical
wheel or jack.--Electrical feast. 187
Observations and suppositions, towards forming a new hypothesis,
for explaining the several phenomena of thunder-gusts. 203