Caption:
Structure of the bellows, Wood panels, hinges and other parts of the bellows, woodcut, p. 296, (Liber nonus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus officia, instrumenta, machinae, ac omnia denique ad metallicam spectantia, non modo luculentissime describuntur, sed & per effigies (...). Basileae: [Froben], 1556.