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[D7919ZEF], Letter from Jacob C Rogers to Thomas Alva Edison, December 27th, 1879

Title: [D7919ZEF], Letter from Jacob C Rogers to Thomas Alva Edison, December 27th, 1879
Editor's Notes: Light Co. stockholder and friend of Fabbri was in party to see TAE recently; has more questions. Is the carbon imperishible? Marg: "No change after 208 hours burning. Cannot conceive how it can be improved." Will expansion/contraction destroy globe? Marg: "Expansion & contraction is slow. [illeg]. When carbon breaks, can fresh lamp be substituted? Extensive marg: "....so far there are 21 lamps that have burned 152 hours without change and 3 lamps 208 hours without change...." Replacement lamps to be inserted in socket: "...we have a new socket so a child can replace a lamp."
Author: Rogers, Jacob C
Recipient: Edison, Thomas Alva
Mentioned: Fabbri, Egisto Paolo
Date: 1879-12-27
Type: Letter
Subject: Carbon, coal, glass, ceramics; Incandescent lamp
Folder ID: D7919-F
Microfilm ID: 50:190
Document ID: D7919ZEF
URL: https://edisondigital.rutgers.edu/document/D7919ZEF
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 50
License: CC0 1.0 Universal

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