[D7941ZGK], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 18th, 1879

Item

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Abstract

"Owing resistance transmitter knock harmless. Regular transmitter, powerful knock eventually destroys chalk, louder chalk quicker destruction. We always used new push hence bug unsuspected. Temporary expedient, new push, reverse chalk holder, polish new groove, gradually. New device allows interruption merely weakens knock."

Date

1879-10-18

Decade

1870-1879

Type

Identifier

D7941ZGK

Folder Set

D7941

Title

[D7941ZGK], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 18th, 1879

Microfilm ID

52:825

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University