[N068143], Technical Note, Ludwig K Boehm, July 7th, 1880
https://edisondigital.rutgers.edu/document/N068143
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Title
[N068143], Technical Note, Ludwig K Boehm, July 7th, 1880
Editor's Notes
Spark tube for Francis (Jehl?). Glass equip, for Hammer; 677 looks like a filament test vacuum apparatus with spark jump.
Author
Date
1880-07-07
Type
Subject
Folder/Volume ID
N068-F
Microfilm ID
34:676
Document ID
N068143
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University