[MD002039], Letter from Walter Seeley Mallory to Ira Mandeville Miller, October 21st, 1889


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[MD002039], Letter from Walter Seeley Mallory to Ira Mandeville Miller, October 21st, 1889

Editor's Notes

Arrived home last night, after leaving the lab Thursday, spending Friday and Saturday at Baltimore and on the road.###Your father must have told you the result of the work up until the day he left. The machine we were working when he was there was finally abandoned, as the "make and break" arrangement caused a good deal of trouble, and before we finished with the machine it was in pretty bad shape; then, on the advice of Swarts, I protested against the use of water on account of the difficulty of being in cold weather up in the Lake Superior region, so we started a series of experiments on some ideas we talked over last spring and finally adopted the machine as shown by drawing with this understanding: had a long talk with TAE Thursday afternoon, and the only trouble with the machine [line obscured] with the phonograph to start in this morning and work steadily on our work all week, and that in case he doen't strike something to give us greater capacity, he will go ahead and build the machines according to the design as drawn, the machine is a very inexpensive one, could probably be built from 6 to 8 dollars per foot; small capacity could be overcome by putting in a quantitiy of them; results obtained from machine are entirely safisfactory, as you will not from test enclosed, starting with native ore at 42 percent and running up to almost absolute purity; new machine takes practically no power to revolve the drum and not much magnetism, so I see nothing in the way of making it a success; enclose a sketch of the new machine, also explanation,




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