A very rare rectangular graphometer with two levels by Gourdin dated 1781
€2,400
Circa
1681
Country of manufacture
France
Description
This is a very rare form of a 18th century French brass graphometer signed and dated “Gourdin au Quart de cercle à Paris 1781”.
This graphometer is rectangular with two water/spirit level. It has no trace of balljoint and stand so was used directly on the plane or planchette or maybe hanged at the plane board.
Then the two levels was used to be sure to work on the right plane.
We cannot trace another similar example of graphometer and the idea and general construction is close to the full circle
A very rare signed and dated French surveying instrument.
The condition is excellent. Size is 19×11,8 cm.
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/
