[LB049015], Letter from Thomas Alva Edison to James J Fronheiser, Cambria Steel Co, April 16th, 1891
https://edisondigital.rutgers.edu/document/LB049015
Transcription
April 16, 1891. Mr. Jas. J. Fronheiser, Sup’t Metallurgical Dep’t., Cambria Iron Co., Johnstown, Pa. Dear Sir:- Replying to your letter of the 14th instant to my Secretary, I beg to say that I am following this matter right up. There is no use making two experiments. I am going to ship a machine to Steelton for the purpose of making preliminary experiments. They have forwarded me a sample of slag, which they say is the run of the dump. From the experiments which I will make at Steelton I shall be able to construct a plant that can be used for working these waste dumps, and it can be duplicated for you. I send you by express a sample of concentrates which are being made at our mill at Ogden, N.J., which has a daily capacity of 2,000 tons of crude ore and an output of 500 tons of concentrates per day of 20 hours. Please analyze the sample and see if it is valuable for your use. We are charging seven cents per unit for the iron, delivered on cars at Ogden, N.J. My impression has been that the freight would not permit you to use these concentrates, but some one was telling me yesterday that your Company was putting in on trial a plant that can be used for working these waste dumps, and it can be duplicated for you. I send you by express a sample of concentrates which are being made at our mill at Ogden, N.J., which has a daily capacity of 2,000 tons of crude and an output of 500 tons of concentrates per day of 20 hours. Please analyze the sample and see if it is valuable for your use. We are charging seven cents per unit for the iron, delivered on cars at Ogden, N.J. My impression has been that the freight would not permit you to use these concentrates, but some one was telling me yesterday that your Company was putting in on trial a plant of the Adams process, and that the Adams process could use fine ore, I have analyses made of these concentrates. One chemist gave 66 metallic iron and .050 phosphorus. The Pennsylvania Steel Co. reports 65.94 metallic iron, and only .005 phosphorus. There is evidently a mistake somewhere. I think the material will carry .050 phosphorus. Yours very truly, (Signed Thos. A. Edison)