Hand-coloured optics engraving with diagrams of spheres, tubes, a tripod stand, a protractor, and a long wooden photometer bench at the bottom.

Optics plate: photometer, optometer and light diagrams, 1820

Hand-coloured engraving titled Optics, Plate XIV, showing scientific instruments and diagrams on a pale ground: spheres with shaded phases, tubes, a tripod stand, a protractor, and a sun and sphere diagram. A long wooden photometer bench labelled Photometer and Optometer runs across the lower part of the sheet.

Artist: Pass, J.
Date: 1819
Medium: Engravings
Source: Wellcome Collection
Size: 4000 × 3132 px

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Public domain · Wellcome Collection marks it Public Domain Mark; made by 1819.
Rights checked 2026-11-05 · tier A · as stated by the source: Public Domain Mark (Wellcome Collection)

Credit (appreciated, not required for public-domain works): Wellcome Collection

wellcome collection hand-colored engraving scientific instruments antique illustration 1820 print optics engraving tripod stand