Device Scientifique. Hemispheres Magdeburg By Glen

Description

Description of the object
Hemispheres of Magdeburg by Deleuil.
"Law or Phenomenon: Highlighting the" void ". Atmospheric pressure is exerted in all directions.
Description: These are two hollow brass hemispheres that can be pressed against each other. Their edges are lined with a leather washer coated with tallow, which allows an airtight contact. One of the hemispheres carries a valve which allows it to be screwed onto a vacuum pump. The other a ring that serves as a handle. "
Encyclopedia of instruments for teaching physics from the 18th to the middle of the 20th century.
Volume 1, Page 361.
The Antiq-Photo gallery
The Antiq-Photo gallery is open Tuesday to Saturday from 11 a.m. to 7 p.m. or by appointment.
We buy for private collectors, institutions and museums
Collections of 19th century photographs and photographic processes, rare cameras, primitive cinematographic devices, scientific, technical, acoustic, optical, electrical or astronomical devices or toys. We offer you an opinion, a council, an expertise of your objects or your collections. We invite you to visit us at 16 rue de Vaugirard in Paris in the 6th arrondissement, between the Luxembourg Gardens and Saint Germain des Prés. We are there from Tuesday to Saturday, from 11 a.m. to 7 p.m.
We buy for private collectors, institutions and museums
Collections of photographs and photographic processes from the 19th century, rare cameras, early cinematographic apparatus, scientific, technical, acoustic, optical, electrical or astronomical instruments and optical toys. We offer advice, information and a valuation of individual objects or entire collections. You are invited to visit us at 16 rue de Vaugirard in the 6th arrondissement, Paris, between the Jardin du Luxembourg and Saint Germain des Prés. We are open from 2pm to 7pm, Tuesday to Saturday.
Collections of 19th century photographs and photographic processes, rare cameras, primitive cinematographic devices, scientific, technical, acoustic, optical, electrical or astronomical devices or toys. We offer you an opinion, a council, an expertise of your objects or your collections. We invite you to visit us at 16 rue de Vaugirard in Paris in the 6th arrondissement, between the Luxembourg Gardens and Saint Germain des Prés. We are there from Tuesday to Saturday, from 11 a.m. to 7 p.m. Collections of photographs and photographic processes from the 19th century, rare cameras, early cinematographic apparatus, scientific, technical, acoustic, optical, electrical or astronomical instruments and optical toys. We offer advice, information and a valuation of individual objects or entire colle