Engraving of a profiled figure linked by wires and a rod to a glass electrical jar labeled Fig. 85, on white paper.

Electrical apparatus with a leyden jar and a figure, engraving, 1792

A black-and-white engraving shows a seated figure in profile, with a metal rod and handle held near the face and a wire running to a glass jar on the right. Labeled letters F through L and the caption Fig. 85 mark the apparatus, drawn with fine hatching against a plain white ground.

Artist: George Adams Jr.
Date: 1792
Medium
Source: Wellcome Collection
Size: 3204 × 4000 px

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Public domain · Wellcome Collection marks it Public Domain Mark; made by 1792.
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

18th century engraving vintage print hatching scientific instruments electricity electrical apparatus science illustration leyden jar physics george adams