[D8123ZAP], Letter from Francis Robbins Upton to Thomas Alva Edison, April 4th, 1881

https://edisondigital.rutgers.edu/document/D8123ZAP

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Title

[D8123ZAP], Letter from Francis Robbins Upton to Thomas Alva Edison, April 4th, 1881

Editor's Notes

Hampton[?] engine "does not give satisfaction." Gramme "is not sensitive enough and allows very large variations in speed" making emf hard to regulate. "The Brown engine was so perfect that it makes this seem doubly bad." Columbia lamps nearly ready. Consider for inclusion; gives information about selection process for prime movers. (DH)

Date

1881-04-04

Decade

1880-1889

Type

Folder/Volume ID

D8123-F

Microfilm ID

57:839

Document ID

D8123ZAP

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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