A Butterfield-type or octogonal horizontal portable sundial in brass signed “Menant A Paris”. The sundial is datable around 1740.
The plate of the dial is engraved with four hour scales for latitudes 40e, 45e, 49e and 52e. The classic gnomon has the bird-shape and is adjustable from 40° to 60°.
The compass is engraved with the cardinal points and a fleur-de-lys fot the magnetic declinaison. The original magnetized needle is well preserved.
The underside of the plate bears the names of 24 cities.
The sundial is of good size measuring 75 × 65 mm. No case.
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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.