01/19/1879 Edison, Thomas Alva -- Technical Notes and Drawings
(Johnson Matthey & Co) Inventions and creativity; Metals and minerals; Incandescent lamp
[N023]  Notebook Series -- Menlo Park Notebooks: Notebook #23 N-79-01-19 (1879)
[N023027; TAEM 31:134]
Courtesy of Thomas Edison National Historical Park.