Difference between revisions of "Birtley coal picker"

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(Created page with "An electric picker that distinguishes between good coal and slate by their different electrical conductivities. It is said to be more accurate than the human slate picker, w...")
 
 
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Source: Dictionary of Mining, Mineral, and Related Terms
 
Source: Dictionary of Mining, Mineral, and Related Terms
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[[Category: Geology]]

Latest revision as of 14:05, 24 June 2021

An electric picker that distinguishes between good coal and slate by their different electrical conductivities. It is said to be more accurate than the human slate picker, who, when fatigued, may fail to remove all the impure material. Mitchell

Source: Dictionary of Mining, Mineral, and Related Terms


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