[LB040455], Letter from Thomas Alva Edison to Dyer and Seely, Henry W Seely, May 9th, 1890
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Title
[LB040455], Letter from Thomas Alva Edison to Dyer and Seely, Henry W Seely, May 9th, 1890
Author
Recipient
Date
1890-05-09
Type
Folder/Volume ID
LB040-F
Microfilm ID
140:1179
Document ID
LB040455
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version
Item sets
Transcription
May 9, 1890
H.W. Seely, Esq.,
Messrs. Dyer & Seely,
#36 Wall St., New York
Dear Sir:-
I beg to acknowledge receipt of your letter under date 6th instant, in regard to an application of mine for a process of duplicating phonograms by depositing through the means of an electric arc or incandescence in a vacuum to make a thin film of metal on the wax phonogram, and in reply I would say that this process is a perfect success and we have deposited hundred of cylinders.
In regard to heat, there is, of course, a certain amount, but as the film deposited is one two-hundred-thousandths of an inch thick, and it takes three hours to make the deposition, the amount of heat given off in a minute over, say 1/8 of an inch square, is exceedingly small.
Yours very truly,
Thos A. Edison
H.W. Seely, Esq.,
Messrs. Dyer & Seely,
#36 Wall St., New York
Dear Sir:-
I beg to acknowledge receipt of your letter under date 6th instant, in regard to an application of mine for a process of duplicating phonograms by depositing through the means of an electric arc or incandescence in a vacuum to make a thin film of metal on the wax phonogram, and in reply I would say that this process is a perfect success and we have deposited hundred of cylinders.
In regard to heat, there is, of course, a certain amount, but as the film deposited is one two-hundred-thousandths of an inch thick, and it takes three hours to make the deposition, the amount of heat given off in a minute over, say 1/8 of an inch square, is exceedingly small.
Yours very truly,
Thos A. Edison