[LB028099], Letter from Thomas Alva Edison to Samuel J Ritchie, February 4th, 1889


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[LB028099], Letter from Thomas Alva Edison to Samuel J Ritchie, February 4th, 1889

Editor's Notes

"Replying to your letter of 30th ult., we have found that the cost of a plant capable of turning out 100 tons of concentrates per day from 40% ore, is $32,000. Two hundred tons per day of raw ore are run through this installation. Your ore is richer than the above, and 200 tons would give you, say, 173 tons of concentrates; hence, for 500 tons of concentrates daily, the plant would cost you, roughly, $85,000. ### I cannot answer your second question very accurately at present, but to give you some idea, I might suggest from 60 to 70 cents per ton of crude ore. ### A plant such as you require could be erected within two months. I am willing to make a contract with your Company for iron separation, on the same basis as our Allentown contract, but not until our Mill at Allentown has run for two or three weeks, so that we can get data upon which to base our calculations. I will not deal with any other parties for Canada for at least a couple of months. ### Will you kindly let me know about that last iron analysis? Was it satisfactory for sulphur?" Yours Truly, [signed] TAE





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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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