[LB047136], Letter from Thomas Alva Edison to Sherburne Blake Eaton, January 29th, 1891
https://edisondigital.rutgers.edu/document/LB047136
Transcription
Jan. 29, 1891. My dear Shaw,- Replying to your letter of 25th instant, the Laboratory guns are already trained on a mechanical meter. Before very long you will be able to place your orders for a thoroughly practical and reliable instrument. Yours very truly, A. O. Tate Private Secretary