Using bellows to increase the draught in a furnace, 1540. Woodcut showing a workman using bellows to increase the draught in a furnace for refining copper. Beneath the bellows are cupellation cakes of partially refined copper. From De la Pirotechnia (The Pirotechnia), by Vannoccio Biringucci, (Venice, 1540).
Pixel Dimensions (W x H) : 5858x2980
File Size : 51,144kb