Civil engineering: canals (below), and a photometer (above). Engraving by Mutlow and Russell.
Wellcome Collection

Civil engineering: canals (below), and a photometer (above). Engraving by Mutlow and Russell.

Unknown artist

CC0 — Public Domain
Wellcome Collection

Lettering: Count Rumford's photometer. The Duke of Bridgewater's under-ground inclined - plane. ; Mutlow sc. ; Russell cot.

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