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[D7919O], Letter from Johnson Matthey & Co to Thomas Alva Edison, February 7th, 1879

Title: [D7919O], Letter from Johnson Matthey & Co to Thomas Alva Edison, February 7th, 1879
Editor's Notes: Sends sample of 30% iridium; hope to get to 40% or 50% but cost "of labor and destruction of tools will be enormous."
Author: Johnson Matthey & Co
Recipient: Edison, Thomas Alva
Date: 1879-02-07
Type: Letter
Subject: Purchases; Metals and minerals; Electric light and power
Folder ID: D7919-F
Microfilm ID: 50:21
Document ID: D7919O
URL: https://edisondigital.rutgers.edu/document/D7919O
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 50