This notebook covers the period November 1887-September 1888. All entries are by Edison. At the beginning of the book is a 10-page draft letter outlining plans for the new West Orange laboratory to James Hood Wright, a partner in the investment banking firm of Drexel, Morgan & Co. and a director of the Edison Electric Light Co. Most of the book contains notes and drawings relating to projects planned for the new laboratory. Included are entries concerning photography, lamp filament, and phonograph cylinder experiments; improvements in the telephone transmitter; and the production of diamonds by chemical means. There are also hypotheses regarding electrical and chemical properties to be tested. Next to each entry is the name of the associate or assistant to whom Edison intended to assign the project, including John Ott, Charles Batchelor, William K. L. Dickson, Arthur E. Kennelly, Martin Force, Franz Schulze-Berge, H. De Coursey Hamilton, John English, and D. T. Marshall. At the end of the book are notes, drawings, and calculations pertaining to hydroelectric power production at Niagara Falls. The book contains 247 numbered pages.

Blank pages: 206-207, 210-211.