Inside Out Library · ExploreScientific American, Vol. 78, No. 4 (1898) (1898)leaf 0THE EDISON MAGNETIC CONCENTRATING WORKS—THE GIANT ROLLS,—{See page 55.] © 1898 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.More pictures from Scientific American, Vol. 78, No. 4 (1898)More like this
