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John peddled the product and became expert on "pure white" and "straw color." He also saw that a part of the so-called refuse could be re-treated and made into a product that was valuable for lubricating purposes. Other men about the same time made a like discovery.
The sand and water then pass over inclined tables covered with blankets, the fibres of which intercept particles of gold and mercury that have escaped from the first process, and afterwards into a concentrating box, where the coarsest grains of sand and the sulphurets of iron, copper, and silver are caught, and with the sand from the blankets re-treated in arrastres.
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