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[N068143], Technical Note, Ludwig K Boehm, July 7th, 1880

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: Boehm, Ludwig K
Date: 1880-07-07
Type: Technical Note
Subject: Vacuum and glass bulb
Folder ID: N068-F
Microfilm ID: 34:676
Document ID: N068143
URL: https://edisondigital.rutgers.edu/document/N068143
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 34