Universal mechanical sundial (without a Plumb-Bob and Compass). St. Petersburg. 1761-1762 or 1763. Invented and made by NiKolay Chizhov. Brass; engraving. The State Hermitage Museum. Saint Petersburg. Russia.

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Size: 2717px × 4320px
Photo credit: © Prisma Archivo / Alamy / Afripics
License: Licensed
Model Released: No

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