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). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Ann Ronan Picture Library |
Bildgröße: | 5858 px × 2980 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |