[D8933AAQ], Letter from Leonard and Izard, Harry Ward Leonard to Thomas Alva Edison, February 25th, 1889
https://edisondigital.rutgers.edu/document/D8933AAQ
→ View document with UniversalViewer
→ View document on Archive.org
→ Re-use this digital object via a IIIF manifest
Title
[D8933AAQ], Letter from Leonard and Izard, Harry Ward Leonard to Thomas Alva Edison, February 25th, 1889
Editor's Notes
Leonard & Izard####Mr. Thos A. Edison Dear Sir--###Enclosed are facts as to the life test at the C.B.& Q up to a few days since. Six of the special lamps which you sent to us by Mr. Upton were put in service at normal pressure as marked upon the lamp, and the average candles per electrical horse power are 200. At the end of about fifty hours they had fallen off about 3 candles, none had broken and the economy was still higher than the initial economy of the previously entered Edison lamps. Rush of very important business has made it impossible for me to get very definite information for the last few days, but will take an early opportunity to furnish you more exact information. I enclose a pamphlet which occasioned considerable amusement at the National Convention a few days since and which emanates from Freeman. A take-off on the Edison red book was also circulated. Johnson being the subject of attack in that case.####Yours very truly####1 enclosure####Harry Leonard####[Enclosure: Chart of Lamp Life Test, C.B. & Q. Ry. Co.]
Recipient
Date
1889-02-25
Type
Folder/Volume ID
D8933-F
Microfilm ID
126:30
Document ID
D8933AAQ
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University