Title
Ventilating a mine
Caption
Mine ventilation. Hollow wooden drum, top, which had two blowholes opposite each other on the circumference, C, one to suck in air and one to expel it as the drum rotated. Inside the drum, fixed to axle on which it rotated, were fans made of wood or of wood and goose quills. HHHH are rods attached to the axle and which acted as a flywheel. Hollow box, bottom, similar to the drum above, but not considered to be as efficient.
From "De re metallica", by Agricola, pseudonym of Georg Bauer (Basle, 1556).
Woodcut.
Date
1556
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP07111_009615P
License type
Rights managed
Available size
21,4Mb (2,0Mb) / 7,0in x 11,8in / 2110 x 3543 (300dpi)