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.
- King George III
- Object Number:
- demonstration equipment
- King's College, London
- Unlinked Name
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
View manifest in IIIF viewer
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.