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Chemistry, Woulff bottles to channel gases through liquids
A set of Woulff bottles, commonly used to prevent liquids from entering vacuum pumps, or to channel gases through liquids, trapping hazardous substances and preventing pressure buildup.
Fresnel lens (lighthouse lens) working and section
Wood engraving drawn by A. Jahandier, engraved by C. Laplante, taken from from “L’èlectricitè” by J. Baille, Paris – Hachette 1868. Multi-part lens for use in lighthouses developed by Augustin-Jean Fresnel, French physicist.
Ancient Egypt, worker making pottery and blowing glass
Collage and elaboration from engravings middle ‘800, representing Ancien Egypt costumes, glass and pottery makers
Horticulture: greenhouse sowing tools and techniques
Horticulture and sowing illustration: small greenhouse with detail of glass window and seed box with plant labels