Using bellows to increase draught in furnace for refining copper. Note cupellation cakes of partially refined copper beneath the bellows. From Vannocio Biringuccio De la Pirotechnia, Venice 1540. Editorial Stock Photo - Afloimages
Using bellows to increase draught in furnace for refining copper. Note cupellation cakes of partially refined copper beneath the bellows. From Vannocio Biringuccio 'De la Pirotechnia', Venice 1540.