[D8818AOO], Letter from Thomas Alva Edison to Harry Ward Leonard, July 6th, 1888

https://edisondigital.rutgers.edu/document/D8818AOO

View document with UniversalViewer   → View document on Archive.org  → Re-use this digital object via a IIIF manifest

Title

[D8818AOO], Letter from Thomas Alva Edison to Harry Ward Leonard, July 6th, 1888

Editor's Notes

In reference to your letter 29th ult., if you will send me a description of the lamps you intend to put up, volts marked on them, c.p. &c., I will send you twenty-five lamps for test. Remember that our lamp is an old 8 1/2 c. p. lamp improved to run at 16 candles, so to get a fair comparison the C. P. & Q. R. R. Co. should get 10 c. p. lamps and run them about 20 c. p., so as to get 240 candles per h.p., and they should be about the same volts as ours, as it is much more difficult to make a 16 c. p. lamp at 240 and 100 volts than a 16 at 50 volts or putting up a 10 per h. p. lamp to 25 or 30 candles to reach 240 candles per h.p.

Date

1888-07-06

Decade

1880-1889

Type

Folder/Volume ID

D8818-F

Microfilm ID

122:418

Document ID

D8818AOO

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Download CSV | JSON