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Mining Cyanide Treatment Counter-Current Decantation Guidebook, 1916 [194353]

Currency:USD Category:Collectibles / Mining Start Price:10.00 USD Estimated At:100.00 - 150.00 USD
Mining Cyanide Treatment Counter-Current Decantation Guidebook, 1916 [194353]
SOLD
50.00USDto m********y+ buyer's premium (12.50)
This item SOLD at 2025 May 05 @ 08:45UTC-07:00 : PDT/MST
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A copy of 'Continuous Counter-Current Decantation', a guidebook published by the Dorr Company in 1916. Dorr was founded in South Dakota in 1913, where it operated a mill in the Black Hills; by 1925, it had grown into a massive operation that owned over 8000 machines processing numerous types of ore. This guidebook instructs the reader on Dorr's method of decantation in cyanide treatment. 38 pages, paper cover. Several photos of mines. Great condition.
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State: South Dakota
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