[N085135], Technical Note, Francis Robbins Upton, October 11th, 1879
https://edisondigital.rutgers.edu/document/N085135
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Title
[N085135], Technical Note, Francis Robbins Upton, October 11th, 1879
Editor's Notes
The lamps leak though no crack can be seen in them The glass may be different. Carbon stick put in arm of bridge and heated resistance decreased, "Mr. Edison thinks that pure carbon could increase its resistance on heating. That the cause of ordinary carbon decreasing is that the fine particles make better contact with each other. Trying to mould a stick of .010 inch diameter and to make them into spirals
Author
Mentioned
Date
1879-10-11
Type
Folder/Volume ID
N085-F
Microfilm ID
35:850
Document ID
N085135
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University