Crystals of verdigris 1, boric acid 2, common salt 3, and sal ammoniac 4 under the microscope. Handcoloured copperplate engraving from Bertuch's "Bilderbuch fur Kinder" (Picture Book for Children), Weimar, 1798. Friedrich Johann Bertuch (1747-1822) was a German publisher and man of arts most famous for his 12-volume encyclopedia for children illustrated with 1,200 engraved plates on natural history, science, costume, mythology, etc., published from 1790-1830.

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Size: 4895px × 5835px
Photo credit: © Florilegius / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1798, acid, ammoniac, bertuch, bilderbuch, book, boric, botanical, children, copperplate, crystal, encyclopedia, engraving, friedrich, german, handcoloured, history, illustration, johann, kinder, magnified, microscope, natural, picture, publisher, sal, salt, verdigris, weimar