Otto von Guericke,German physicist,19th C illustration

Numéro d’image : 12961720
Otto von Guericke,German physicist,19th C illustration
Otto von Guericke (1602-1686). 1891 illustration of the German engineer and physicist Otto von Guericke with the first electric friction machine. Guericke carried out research into the existence and nature of vacuums. He devised an air vacuum pump and used it to show that sounds cannot be heard in a vacuum and that flames are extinguished. He also showed that when two large metal hemispheres (the 'Magdeburg hemispheres') were placed together and the air within was pumped out,they require great force to separate them. Illustration from 'Physique Populaire' by Emile Desbeaux.
Licence : Droits gérés
Crédit: Science Photo Library / Collection Abecasis
Taille de l’image : 3728 px × 2813 px
Model Release : Non requis
Property Release : Non requis
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