Sujet

Investigating atmospheric electricity in normal cloudy conditions

Légende

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).

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Photos12.com - Ann Ronan Picture Library

Crédit

Photo12/Ann Ronan Picture Library

Notre référence

ARP07114_011084P

Licence

Droits gérés

Format disponible

27,3Mo (2,8Mo) / 30,0cm x 22,8cm / 3543 x 2695 (300dpi)