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Category:	Miscellaneous
Word Count:	1073
Featured Papers from DirectEssays 1. gold rush 2. gold price in the US 3. Gold in Grendel 4. nazi gold 5. Gold 2

	gold
	As gold mining developed, different methods were introduced and hydraulic mining was created. The hydraulic method consists of directing a powerful stream of water against the gold-bearing gravel or sand. This operation breaks down the material and washes it away through specially constructed artificial channel in which the gold settles, while the lighter gravel is floated off. For mining on rivers, elevator dredges are generally used. The elevator dredge is a flat-bottomed boat that uses an end

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