Investigating atmospheric electricity in normal

Investigating atmospheric electricity in normal cloudy conditions, but not during a thunderstorm. GF: windlass for raising and lowering a kite. AB: wooden frame supported by mahogony legs with glass cones covered with brass funnels to prevent glass getting wet. H: drawing spark from conductor and experiencing shock similar in strength to that from a fully charged Leyden jar. Leyden jar was attached to conductor, but it was not fully charged. Engraving from Practical Electricity and Galvanism by John Cuthbertson (London, 1807)

1807 Charged Cones Cuthbertson Experiencing Fully Funnels Galvanism Investigating Kite Leyden Lowering Normal Practical Prevent Raising Similar Spark Supported Thunderstorm Windlass

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