The Thomas A. Edison Papers Digital Edition

This notebook covers the period February 1888-April 1889. All entries are by Edison, except for one entry by Arthur E. Kennelly. Included are notes and drawings regarding a long-distance telephone transmitter using phonograph cylinder technology. There are also entries pertaining to battery experiments, disc phonographs, and a fluorescent light caveat; cost calculations relating to the buildings and employees required for an ore milling operation; and notes and drawings concerning electromagnetism. The pages are unnumbered, and the book has been used in both directions. Approximately 120 pages have been used.