"testing the percent of cu in the wire for the armature." Misc....probably cable insulation tests.

Jehl, Francis

1880-09-16

1880-1889

Technical Note

Cables, feeders, and other exterior elements

N104115

N104

[N104115], Technical Note, Francis Jehl, September 16th, 1880

36:324

Thomas Edison National Historical Park

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