[LB039353], Letter from Thomas Alva Edison to D W Dunn, April 7th, 1890
https://edisondigital.rutgers.edu/document/LB039353
Transcription
April 7th 1890 D.W. Dunn, Esq., Care Hughes and Gawthrop, Rooms 712-713 Lewis Black Pittsburgh, Penn Dear Sir:- Replying to your letter of 2nd instant, I beg to say, that we do not sell machines for ore separation. We erect mills having a capacity of, from five hundred to one thousand tons every twenty-four hours. The separating machine is but a small part of the apparatus, as the whole process, from start to finish, is designed to work automatically, whereby the very smallest amount of labor is necessitated. I could write you more intelligently if I know the application you desire to make out of the system. Very truly yours, Thos A. Edison