This notebook consists of twenty-eight unbound and laminated leaves, which have been numbered by an archivist. The entries are in Edison's hand. The first several leaves contain lists of machines, tools, office furniture and supplies, and accounts of personal and business expenses. There is also a one-page agreement of October 29, 1870 between Edison and Samuel W. Ropes, Jr. The latter part of the book contains descriptions and drawings of printing telegraph and other apparatus "Drawn at L Serrells office" on October 3, 1870 and a drawing of a chemical pen dated Oct. 10, 1870. The inside back cover bears the inscription "all new inventions I will here after keep a full record."

Blank pages: 11, 14, 16.