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506722
Caption: A zinc-lead blast furnace and lead-splash condenser rotors
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 34.27 MB
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506700
Caption: The rocker, or cradle, form of placer mining enabled one miner to handle more material than by simple panning
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 33.43 MB
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481053
Caption: Baghouse employing an array of fabric bags for filtering the airstream.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 41.86 MB
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248210
Caption: An ilustration of a rock hopper
Artist: ImageZoo
Release: Not Applicable
File Size: 30.48 MB