[LB063449], Letter from Thomas Alva Edison to Frederick Perry Fish, April 11th, 1899
https://edisondigital.rutgers.edu/document/LB063449
Transcription
April 11 1899 Mr. F.R. Fish 80 Broadway, New York, Dear Sir: Years ago I got up what is called a sonorous Valitometer. A point in the liquid formed gases, which polarized up so rapidly that it gave a musical sound by automatic make and break. I will try and find the data. Yours truly, Thos A. Edison April 11, 1899. Mr. F. P. Fish, 80 Broadway, New York. Dear Sir:- There is considerable demand for a dry battery. There are many[?] in the field, we should like to handle a good one if your friend has it. Yours truly, Thos A Edison