“The remarkable approach of crushing and magnetic separation of iron ore at Mr. Thomas Edison’s performs in New Jersey shows a attribute originality and freedom from the trammels of tradition. The rocks of iron ore are fed by means of 70-ton ‘giant rolls’ that can seize a 5-ton rock and crunch it with significantly less clearly show of effort than a canine in crunching a bone. Just after passing by means of many rollers and mesh screens, the finely crushed product falls in a slender sheet in entrance of a sequence of magnets, which deflect the magnetic particles made up of iron. This is the most up-to-date and most radical development in mining and metallurgy of iron.”

Scientific American, January 1898

Much more gems from Scientific American’s to start with a hundred seventy five yrs can be observed on our anniversary archive web site.