This undated notebook was probably used in 1895. The book consists primarily of notes by Edison regarding a series of squirted filament experiments, nos. 1-62. Preceding these notes is a list of solutions used to treat the filaments. Inserted into the book are several loose sheets containing notes by Edison to experimenter Charles Dally concerning the testing of the filaments at the General Electric lamp works in Harrison, N.J.; and logs of the tests by Charles Deshler. The pages are unnumbered, and several pages have been removed from the book. Approximately 75 pages have been used. Courtesy of Thomas Edison National Historical Park.