^tuniii'u %mtxitm. 56 [January 22, 1898. does the work. The rolls are 6 feet in dia- grooves of the lower sleeve and over the meter, with a 6-foot face, and when they … the aperture between faces of which is of a series of three 12-inch magnets (Fig. Fig. l.-THE EDISON MAGNETIC CONCENTRATORS. about 214 inches. Unlike the giant rolls 1). The tailings, or the crushed particles these are positively driven ; but to avoid of rock which are not drawn over by the…
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