[CJ001AAU], Letter from Henry M Livor to Thomas Alva Edison, October 24th, 1889


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[CJ001AAU], Letter from Henry M Livor to Thomas Alva Edison, October 24th, 1889

Editor's Notes

Dear Sir: While at Bechtelsville yesterday I made some experiments for the purpose of reducing the amount of iron in the tailings from the second magnet going to the waste heap, and just before leaving made the following analysis. As you will see the crude ore ran unusually low. Crude ore contained 11.28 metallic iron. The Concentrate at the first magnet was 66.16, the tailings from the first magnet going to the second magnet was just exactly 6%. The tailings from the second magnet going to the waste heap was 2.77. The Concentrate at the third magnet was 62.49, the tailings from the third magnet were 8.70.##The parting board at the second magnet was set about 3/8 of an inch from the slit. The magnet was about 3/4 inches from the stream of ore. IN putting the magnet any closer than this, in fact even at this distance from the stream, a gret deal of the ore accumulates on the face of the magnet, therefore I did not think it advisable to set the magnet any closer: still if we had 25 or 30% ore to work on, and could obtain the same result as above, the waste would be trifling as you will admit. I would like to hear from you as to what you think of these results.##The mine looks to me better that it has at any time yet. There is more ore in sight than at any time since we have begun operations, and I have great hopes that within two or three weeks that we shall be getting out 100 tons per day of ore that will average considerably higher than the ore we are now using. Most of the ore we are using is coming from over the tunnel, near the surface, and is, as you know, quite lean. I think the fore in the shafts will run up to fully 20% if not more. We have now got mined in the shafts probably 500 or 600 tons of this ore which we epxect to commence taking out in a few days. The min at present is not in a condition for us to get at it economically. Yours truly, H M Livor General Manager




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