[N085135], Technical Note, Francis Robbins Upton, October 11th, 1879

Item

Abstract

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

Date

1879-10-11

Decade

1870-1879

Identifier

N085135

Folder Set

N085

Title

[N085135], Technical Note, Francis Robbins Upton, October 11th, 1879

Microfilm ID

35:850

Publisher

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