009601
Carpenters constructing a stamping mill for breaking up ores and extraction of metals. Men on the left are measuring up a baulk of timber, K, to form a cam-shaft. A completed cam-shaft at H fitted with cams I. B is the stem of a single stamp, A. All the pieces of the mechanism are made of wood. From 'De re metallica', by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut.
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