Artist's impression of the Benjamin Franklin's (1706-1790) investigation of the electrical nature of lightning,made at Philadelphia,USA,in September 1752. Franklin is flying a kite in a thunderstorm and is drawing a spark off the kite string using key. Engraving from The Boy's Playbook of Science by John Henry Pepper (London,1862) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / UIG / Universal History Archive |
Taille de l’image : | 2956 px × 2956 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |