Diderot & d’Alembert (1768) ‘Mineralogy, 7th collection. Veins and Works in Mines, plate 2 (p.157) from Encylopedie, v23. Copperplate engraving

Diderot & d’Alembert (1768) ‘Mineralogy, 7th collection. Veins and Works in Mines, plate 2 (p.157) from Encylopedie, v23. Copperplate engraving

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Diderot & d’Alembert (1768) ‘Mineralogy, 7th collection. Veins and Works in Mines, plate 2 (p.157) from Encylopedie, v23. Copperplate engraving (41.5 x 30cm), with clear plate mark (36 x 23cm) showing, fig 1, horizontal and ‘crossing’ and interrupted [faulted], metal veins, and fig 2 using fire underground to facilitate exploitation. Slightly age toned but clean and in very good condition. In French.