A simple Deleuil dip circle, circa 1850s’

A simple Deleuil dip circle, circa 1850s’




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Categories: Natural history, Surveying Instruments & Mining, Engineering antiques, Calculating, Scientific, Technology


A quite rare dip circle signed “Deleuil Pairs” so datable 1850-1860s’. The instrument was made by Louis Joseph or Jean-Adrien Deleuil, the father or the son.

Mounted on three screws rounded stand, a circle is divided in four times 0 to 90 degrees. In its middle a needle gives the dip angle, the angle between the horizon and the Earth’s magnetic field.

The circle measures 13,5cm diameter and the instrument 27cm height.


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FR 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/

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