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.
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Details
Creative#:
TOP09159535
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
NO
Property Release:
NO
Right to Privacy:
No
Same folder images:
MineventilationHollowwoodendrumtoptwoblowholesoppositeeachcircumferenceonesuckaironeexpeldrumrotatedInsidedrumfixedaxlerotatedfanswoodwoodgoosequillsHHHHrodsattachedaxleactedflywheelHollowboxbottomsimilardrumabovebutnotconsideredefficientDeremetallicaAgricolapseudonymGeorgBauerBasle1556WoodcutMining
1556AgricolaBasleBauerDeGeorgHHHHHollowHollowInsideMineMiningWoodcutaboveactedairattachedaxleaxleblowholesbottomboxbutcircumferenceconsidereddrumdrumdrumdrumeachefficientexpelfansfixedflywheelgoosemetallicanotoneoneoppositepseudonymquillsrerodsrotatedrotatedsimilarsucktoptwoventilationwoodwoodwooden
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