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[D8518K], Letter from Boulton Carbon Co to Thomas Alva Edison, June 18th, 1885

Title: [D8518K], Letter from Boulton Carbon Co to Thomas Alva Edison, June 18th, 1885
Editor's Notes: [Letterhead of The Boulton Carbon Co.] We made carbons as you suggested by the use of licorice as a binder with powdered petroleum coke. We had trouble getting the mixture to adhere after being put under a pressure of 350 tons. After carbonizing, we found that the carbons made with this combination burned in the lamps poorly, "blazing, sputtering and giving off sparks to an unusual extent." Do you have any further suggestions? TAE Marg: "You have evidently not operated with it in the proper manner, as one of my assistants made carbons in a hand press, which burned against a regular carbon of equal size lasted 1/3 longer--you should experiment more."
Author: Boulton Carbon Co
Recipient: Edison, Thomas Alva
Date: 1885-06-18
Type: Letter
Subject: Production difficulties and adjustments; Carbon, coal, glass, ceramics; Incandescent lamp
Folder ID: D8518-F
Microfilm ID: 77:504
Document ID: D8518K
URL: https://edisondigital.rutgers.edu/document/D8518K
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
License: CC0 1.0 Universal
Has Version: Archive.org Viewer, Microfilm Series Reel 77

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