11/29/1890 Kennelly, Arthur Edwin and Phelps, Fred A, Jr [supplied or conjectured] -- Technical Notes and Drawings
(Edison General Electric Co) Dynamos and generators; Miscellaneous electrical technologies; Mathematics
[NM026]  Notebook Series -- Arthur E. Kennelly Notebooks: Notebook #4 (1890-1891)
[NM026018; TAEM 105:29]
Courtesy of Thomas Edison National Historical Park.