Scientific American. 56 [JANUARY 22, 1898. does the work. The rolls are 6 feet in dia- … the aperture between faces of which is of a series of three 12-inch magnets (Fig. Fig. 1—THE EDISON MAGNETIC CONCENTRATORS. about 244 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 face.…
Internet Archive · Public domain (published before 1931). Free to use for anything.
