machine No 4 heated more than any other. {dynamo? lamp factory motor?} Sketchy notes on other machines.

Jehl, Francis

1880-09-10

1880-1889

Technical Note

Dynamos and generators

N104110

N104

[N104110], Technical Note, Francis Jehl, September 10th, 1880

36:322

Thomas Edison National Historical Park

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