Time Marches On… Welcome Autumn

Original image from Otto von Guericke’s Experimenta nova (ut vocantur) Magdeburgica de vacuo spatio //

Though the first part of his Experimenta is dedicated to explaining cosmic systems, it is more well known for the later sections where he describes the creation of a vacuum between two spheres and a device that produces static electricity by generating friction against a moving ball of sulfur.

// Animated Image © Smithsonian Libraries /// via //

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