[LB024477], Letter from Samuel Insull to Grace (W.R.) & Co, June 2nd, 1887
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Title
[LB024477], Letter from Samuel Insull to Grace (W.R.) & Co, June 2nd, 1887
Editor's Notes
In reply to your letter 23rd inst. I beg to say that the Ore Milling Machine only seperates gold from magnetic iron sand. If the Iron sand is mixed with quartz the gold and quartz will fall on one sid and the magnetic iron sand on the other. The separator is only useful where the gold is found in alluvial sand with large quantities of iron sand. It requires a 3 horsepower engine and boiler and a (?) horsepower dynamo and separator. Cost of Engine Boiler (illegible) $300 ## Dynamo 250 ## Separator 850## The same engine and dynamo will run two seperators each of which will separate one hundred tons of iron sand in ten hours.
Author
Recipient
Date
1887-06-02
Type
Folder/Volume ID
LB024-F
Microfilm ID
138:142
Document ID
LB024477
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University