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Editorial
Editorial Machinery for making cutlery: troughs of a grinding mill, tongs for pressing knife handles, pressing vice and spring drill. Copperplate engraving by Wilson Lowry after a drawing by John Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Art...
Editorial Washing the ores_3, Especially tin ores were mixed in wide troughs with water and washed, woodcut, p. 240, (Liber ocavus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus officia, instrumenta, machinae...
Editorial Waschtr?ge_6, Multi-level system of wash troughs, gutters and lattices, woodcut, p. 278, (Liber octavus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus officia, instrumenta, machinae, ac omnia deniqu...
Editorial Washing of tin hearts in a Giessbach, Troughs are embedded in a Giessbach and the tingrains are washed in them, woodcut, p. 297 279, (Liber octavus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus off...
Editorial Sand mixture is washed in suspended troughs, The sand mixture obtained from the tree trunks is washed in suspended troughs, the trough is moved back and forth, the gold pieces are collected, woodcut, p. 269, (Liber octavus), Manuel, Hans Rudolf (graveu...
Editorial Washing the ores_5, The tarpaulins are rinsed out in a trough, the cross troughs throttle the water flow, woodcut, p. 251, (Liber octavus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus officia, inst...
Editorial Washing in troughs, Wash troughs created in the slope are used to wash the tin, inserted sheets hold coarse material back, Handwritten comment on the edge of the page, woodcut, p. 285, (The Eight Book), Manuel, Hand Rudolf (graveur sur bois), 1557, Gre...
Editorial Waschtr?ge_5, Wash troughs created on a slope slope are used to wash the tin, inserted sheets retain coarse material, woodcut, p. 276, (Liber octavus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus o...
Editorial African slaves washing silt from diamonds in troughs at the Mandanga diamond-works on the Jequitinhonha river, Brazil. Colonial overseers sit on platforms near the riverbank. Handcoloured copperplate engraving by Verico from Giulio Ferrrario's Costumes...
Editorial Machinery for making cutlery: troughs of a grinding mill, tongs for pressing knife handles, pressing vice and spring drill. Copperplate engraving by Wilson Lowry after a drawing by John Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Art...