George III's Magdeburg hemispheres

Made:
1761
maker:
George Adams

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Brass Magdeburg hemisphere apparatus, on a wooden stand. Magdeburg hemispheres. In the mid 17th century Otto von
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Magdeburg hemispheres. In the mid 17th century Otto von Guericke used an air pump to remove the air from between two
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Brass Magdeburg hemisphere apparatus on a wooden stand, made by George Adams, Fleet Street, London, 1762.

In the mid-seventeenth century Otto von Guericke used an air pump to remove the air from between two large close-fitting hemispheres. Teams of horses could not separate them. A scaled down version carried out with air pumps became a standard demonstration. If the air was removed from between the hemispheres, a weight of 40 lb was required to separate them. However, if they were placed in a bell jar and the air was removed, they fell apart. These hemispheres were made by George Adams for King George III.

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Details

Category:
King George III
Object Number:
1929-115
Materials:
brass, cork, mahogany (wood)
type:
demonstration equipment
credit:
King's College, London

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