Inside Out Library · ExploreA practical treatise on mine engineering (1855)Greenwell, G.C · Lambert · leaf 277PLATE 56 … / , { /mbcrfs ' / ft/t . t \ rxrYifff/cBergbautechnike-rara · ETH-Bibliothek · No known copyright restrictions. Free to use for anything.More pictures from A practical treatise on mine engineeringMore like this
