A liquid prisme in brass and glass, France, circa 1870-1880
€600
Circa
1880
Country of manufacture
France
Description
A fine brass and glass liquid prism, unsigned but France, circa 1870-1880.
From Ganot’s Physics (1883): “The prism with variable angle is used for showing that the angle of deviation increases with the refracting angle of the prism. It consists of two parallel brass plates fixed on a support. Between these are two glass plates, moving on a hinge, with some friction against the plates, so as to close it. When water is poured into the vessel the angle may be varied at will. If a ray of light be allowed to fall on one of them, by inclining the other more, the angle of the prism increases and the deviation of the ray is seen to increase.”
The present example is well preserved and in good working condition.
It measures around 35cm height.
Ask the Dealer
Dealer information
Le Zograscope
Established by Alexandre Piffault in 2014 and based in Paris at 5 rue de Condé, 75006, very close to Odéon, Le Zograscope specializes in antique and rare books in Science, Medicine and Technology, and rare antique instruments in the same fields. We have especially a strong interest in early and continental microscopy, early and special mathematical/drawing instruments, medical and surgical instrument, and rare technology.
Personnal website : https://www.lezograscope.com/
