[D7919ZED], Letter from J Dyle to Thomas Alva Edison, December 23rd, 1879
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Title
[D7919ZED], Letter from J Dyle to Thomas Alva Edison, December 23rd, 1879
Editor's Notes
Would TAE like vacuum pump on which he is co-patentee, which produces perfect vacuum? Marg: "There never has been vacuum produced in this country that approached anywhere near vac wh is necessary for me to produce. We prod a vacuum in 3 minutes wh when the mercury guage becomes useless as a measure for such rarification wh continues an hour after and measure by what is called the lead guage."
Author
Recipient
Date
1879-12-23
Type
Subject
Folder/Volume ID
D7919-F
Microfilm ID
50:187
Document ID
D7919ZED
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University