[D8123ZDR], Letter from Francis Robbins Upton to Thomas Alva Edison, September 1st, 1881
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Title
[D8123ZDR], Letter from Francis Robbins Upton to Thomas Alva Edison, September 1st, 1881
Editor's Notes
Oscillating device on pumps seems to do some good. Using calcium chloride yields spotted carbons; pump working with lithium chloride works slowly. Welsh waiting for new furnace doors before trying TAE's suggestion re carbonization. Bradley says that bamboo fibers branch out and vary in size and are apt to tear apart. Upton trying to reduce breakage and has succeeded in reducing by half from what it was 3 months ago. Estimates that 5% of old lamps fail to hold their vacuum. Consider for inclusion: gives good detail of work in shop. (DH)
Author
Recipient
Mentioned
Date
1881-09-01
Type
Folder/Volume ID
D8123-F
Microfilm ID
57:956
Document ID
D8123ZDR
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University