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[D8636D], Memorandum, Hugh De Coursey Hamilton, March 20th, 1886

Title: [D8636D], Memorandum, Hugh De Coursey Hamilton, March 20th, 1886
Editor's Notes: Record of work at lab to be included in telegram to TAE [see D8636B]; 25 small condensers finished and sent to RTT Co.; now making experimental ones with different grades of tissue paper.###Hydraulic press set up in Brooklyn; machine for mixing carbon received from Goerck St. and is now working.###All instruments re: Phonoplex here from Bergmann and improvements made to keep "weight from shifting & changing tone."###Experiments made on phonoplex battery & new form adopted; R.R. lamp experiment completed & inspected by Insull; Bunnell underbids WE on condensers. [The end of this memorandum appears in [D8636E]
Author: Hamilton, Hugh De Coursey
Mentioned: Railway Telegraph and Telephone Co; Bunnell (J.H.) & Co; Western Electric Co; Bergmann & Co
Date: 1886-03-20
Type: Memorandum
Subject: Research and development; Phonoplex and railroad telegraphy
Folder ID: D8636-F
Microfilm ID: 79:1048
Document ID: D8636D
URL: https://edisondigital.rutgers.edu/document/D8636D
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 79

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