Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 754
was the washing of the material,. 702 GOLD AND DIAMONDS. in order to remove sand and dirt, and this process was usually performed atthe margin of the river, where the gravel was brought down in carts and de-posited in a suitable place, at which a cradle was erected. The cradle wassimply a strong… … Fig. 332.—Pniel,from Jardines Hotel {c. 1870). pass through. The cradle was capable of receiving a rocking movement, andwhile the gravel was thus sorted, water was freely poured on the upper-most layer, so that the stuff was in a short time thoroughly cleansed andsorted. When this had been…
Inventions
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