© Fonds historique / CNRS Photothèque
Specimens of gigantic leeks photographed on May 24th, 1930. Apart from being tested on cars, the power of electricity was explored for crops. With the assistance of Lucien Plantefol, at the time a laboratory assistant at the École normale supérieure, Jules-Louis Breton conducted research at the Office on electroculture, the use of electricity and magnetism to assist plant growth. A 2 kilowatt transformer was connected to the grid and tests were carried out involving electrified and non-electrified planted parcels. Leeks seemed to be the crop most receptive to electricity, doubling in weight when they were cultivated in this manner. Office national des recherches scientifiques et industrielles et des inventions.