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Copperas Factory (1556)

Unrestricted image - Project Gutenberg Licence
Image Caption: 
Copperas factory from Agricola's De Re Metallica (1556). On the right a Bolier, and top left a vat with ropes (instead of branches) to collect the copperas by crystallisation.
Asset Author: 
Georgius Agricola / Clacton VCH Group / Project Gutenberg