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[N085101], Technical Note, Francis Jehl, Francis Robbins Upton, October 7th, 1879

Title: [N085101], Technical Note, Francis Jehl, Francis Robbins Upton, October 7th, 1879
Editor's Notes: this is discussion of Pump No. 4 but undated; fr. 835 iron spirals in vacuum; fr. 837 Mr. Eidson proposes measuring the amount of air given off from a spiral by means of McCleod guage. The exaustion should be once made and the pump stopped, then if the capacity of the guage and the pump be known the air given off may be calculated"; fr. 838 Spirals covered with lime; fr. 841 spiral covered with zinc; fr. 842 spirals covered with one of titanic oxide and another of zinc; fr. 844 includes photometer tests; fr. 845 MacCleod gauge; Supplied year, month, and day
Author: Jehl, Francis; Upton, Francis Robbins
Mentioned: Edison, Thomas Alva
Date: 1879-10-07
Type: Technical Note
Subject: Incandescent lamp; Vacuum and glass bulb
Folder ID: N085-F
Microfilm ID: 35:833
Document ID: N085101
URL: https://edisondigital.rutgers.edu/document/N085101
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 35

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