Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Jig versus riffle concentration in gold dredging
Attention directed to comparative ratios of concentration at various stages; hypothetical case of dredge treating 45,000 cu yd per week is discussed, volumes and ratios in diagram showing approximately what is to be expected in average property in one week's operation; advantages lie with jigs, as they reduce material by stages, in manner that permits adjustment without remodeling dredge.
Jig versus riffle concentration in gold dredging
Attention directed to comparative ratios of concentration at various stages; hypothetical case of dredge treating 45,000 cu yd per week is discussed, volumes and ratios in diagram showing approximately what is to be expected in average property in one week's operation; advantages lie with jigs, as they reduce material by stages, in manner that permits adjustment without remodeling dredge.
Jig versus riffle concentration in gold dredging
Eng Min J
Galloway, T.D. (Autor:in)
1940
2 pages
Aufsatz (Zeitschrift)
Englisch
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British Library Online Contents | 1999
| Engineering Index Backfile | 1899
| Engineering Index Backfile | 1901
Online Contents | 1999