This notebook covers the period December 1882-April 1884. The entries are by Edison, John Ott, Martin Force, Edward G. Acheson, George Gibbs, E. D. Kellogg, and H. de C. Hamilton. Many of the entries relate to carbon filament experiments and include notes and drawings of compound carbon filament lamps; carbons made from parchmentized paper, animal wastes, and foodstuffs such as flour, molasses, and gelatin; and chemical treating of filaments. There are also extensive notes and drawings of meter experiments, including meters using chemical paper. In addition, there are a few notes and drawings relating to safety catches, electro-vacuum experiments to produce gold foil for use in lamps, experiments on the absorption of materials, and battery experiments. The label on the front cover is marked "7th St & Ave B New York." The book contains 284 numbered pages.
Blank pages: 20-25, 120-121, 176-283. Courtesy of Thomas Edison National Historical Park.