[D8034ZDE], Letter from A W Weeks to Thomas Alva Edison, June 29th, 1880

Yours of 24th rcd. In your machine, do iron oxide & magnetite fall together or are they separated? Marg: "the ferrous or ferric oxides as well as the magnetite can be made to fall together or the magnetite may be separated from the oxide, but it is difficult to separate ferric from ferrous oxide. The machine requires 2 horses or a small motor of 2 horsepower."

Weeks, A W

Edison, Thomas Alva

1880-06-29

1880-1889

Letter

Ore milling and separation

D8034ZDE

D8034-F

54:765

Thomas Edison National Historical Park

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