Underground Mining High Resolution Stock Photography
Bewetterung_9, Supply of fresh air in the underground mining over different stages, at the top with a horse''s furniture operating bellows, translation on a cogwheel and at the bottom via a pedal mechanism moving bellows, woodcut, S. 169, (Liber sextus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus officia, instrumenta, machinae, ac omnia