... being 265 to 300 francs per ton, with traces in the scoria. The second Expedition failed to find gold, but brought back argentiferous galena in copper-stained quartz, and possibly in the ochraceous red veins seaming the Secondary gypsum; with silicates and carbonates of copper: select specimens of the latter yielding the enormous proportion of forty per cent. In this northern region the great focus of metallic deposit appears to lie between north lat. 28 40' and 27 50'; that ... — The Land of Midian, Vol. 1 • Richard Burton
...
