"I was in New York yesterday with the intention of visiting the laboratory, but learning that a test was to be made of magnetic concentration by the Wenstrom [Swedish] apparatus I visited Riotte's works and was detained until after 4.P.M. when I considered it too late to be of any service at Orange. I will report to you the operation and analyses of results of the Wenstrom separator and also of the Buchanan separator at the Croton mines. ### Mr. John D. Cheever wishes to visit the Laboratory with me and I will arrange to bring him out." Yours truly, Jno. Birkinbine

Birkinbine, John

Edison, Thomas Alva

1888-10-13

1880-1889

Letter

Ore milling and separation

D8845AEJ

D8845

[D8845AEJ], Letter from John Birkinbine to Thomas Alva Edison, October 13th, 1888

123:1000

Thomas Edison National Historical Park

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