[LB062509], Letter from Thomas Alva Edison to Beckwith (S.C.) Special Agency, June 5th, 1896
https://edisondigital.rutgers.edu/document/LB062509
Transcription
June 5th 96 The S. C. Beckwith Special Agency. Tribune Building New York. Dear Sirs:- In reply to your favor of the 4th inst, I beg to state that the lamps are all right just as the Incandescent Lamp was all right, but it required three years to devise the apparatus to practically commercialize it and it will require that time for the fluorescent lamp if it can be done at all. Yours truly Thos. A. Edison R[andolph]