Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 742
very rough kind of washing to thedepth of I ft. Soil of this kind has been carried down by rivers and streamsages ago; and the lighter particles having been carried off by the water,while the gold, from its greater specific gravity, remained at the bottom of 44 690 GOLD AND DIAMONDS. the stream,… … Fig. 330.— Gold in Rocks. molten state. The gold-miner often finds his reward in burrowing beneaththese basalts and lavas, following the bed of the ancient river, and re-covering its long-buried treasures. The methods of carrying on the gold-seeking operations vary accordingto the nature of the…
Inventions
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