[LB027185], Letter from Alfred Ord Tate to Samuel Insull, November 27th, 1888


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[LB027185], Letter from Alfred Ord Tate to Samuel Insull, November 27th, 1888

Editor's Notes

"We made some experiments recently with an iron ore that was sent us from Allentown, Pa., by Mr. H.K. Hartsell. Samples were sent him of the results which we obtained, and he now writes us under date 24th instant, to the effect that the result of concentrating his ore has been satisfactory, and wishes to know upon what basis he can obtain a concentrator. Mr. Edison suggests that the machine and appliances be furnished at cost, and a royalty charged of 15 cents per ton of concentrates. For your information I may say that, other concentrators can be obtained, more particularly the Conkling process, at a royalty to the users of about six cents per ton, and the question may be asked, why we should be paid 15 cents per ton. In replying to this question we can say that our machine will give three units more iron in concentrates than any other machine. As iron is salable at ten cents per unit, this shows up 30 cents per ton in favor of our machine immediately. The great output of Mr. Edison's process must also be considered, together with the fact that there are no wearing parts, and the machine requires very little attention and small amount of power. Mr. Edison states that he can furnish a man to instruct Mr. Hartsell's engineer. I have not written Mr. Hartzell, and will do nothing further until I hear from you." Yours very truly, A.O. Tate





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