The only dated entry in this notebook is from December 1908. All entries are by Edison. The book contains notes and drawings regarding the preparation of nickel flake and the loading of the flake into the grids of storage battery cells. Some of the entries indicate the involvement of Walter N. Archer, George H. Hooper, Jr., and Charles Dally. Inserted into the book are 2 pages of notes by Edison. The front cover is labeled \"Ent.\"" The pages are unnumbered. Approximately 20 pages have been used."