Brass rectangular protractor, by Francis Watkins, circa 1760

Brass rectangular protractor, by Francis Watkins, circa 1760

€850

Circa

1760

Country of manufacture

UK and Ireland

Categories: Scientific, Calculating, Drawing Instruments

Description

A good English rectangular protractor in brass, engraved “F. Watkins”, circa 1760.

As well as the usual angular scale the instrument contains a diagonal scale for plotting distances on a map or plan ; on the other side, 7 mathematical scales and 5 reduction or chart scales.

Watkins was actif between 1747 and 1786, so we can date the instrument circa 1750-1760.

Good condition.

The instrument measures 15,7cmx4,8 cm.

15,7cmx4,8 cm.

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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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