Nikola Tesla holding a highly evacuated, gas-filled tube, powered by one of his high-frequency oscillator units. 1898
Conversation
Etienne Leopold Trouvelot. Electric discharges to the surface/edge of a coin obtained with a Wimshurst machine, 1888
2
3
4
Replying to
The Aurora Borealis over Dawson, Alaska, January 2nd, 1908
Fumeuse d'Opium, Indochina, Photographed by Léon Busy, 1915
1
1
1
Show replies
