Extracting saltpetre from the ore and the instruments used. Etching by Bénard after Goussier.
Wellcome Collection

Extracting saltpetre from the ore and the instruments used. Etching by Bénard after Goussier.

Louis-Jacques Goussier

CC0 — Public Domain
Wellcome Collection

Lettering: Minéralogie, extraction du salpêtre. Préparation des plâtres & c. Goussier del. Benard fecit.

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