Men splitting slate and cross-section of a shaft. Etching by Bénard.
Wellcome Collection

Men splitting slate and cross-section of a shaft. Etching by Bénard.

Unknown artist

CC0 — Public Domain
Wellcome Collection

Lettering: Minéralogie, ardoiserrie de la Meuse. Attelier pour le travail des ardoises et plan et profil d'un banc d'ardoise moins epais que celui de Rimogne. Benard fecit.

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