This notebook was used by Ludwig F. (Louis) Ott during November-December 1914 for notes on various chemical experiments. Most of the entries pertain to storage batteries and nickel hydrate for battery tubes. One entry describes a polishing compound for records. Numerous pages of loose notes, including some by Edison, have been inserted into the book. One loose item is dated December 22, 1919. The front cover is labeled by Edison, "Not very Important." The pages are unnumbered. Approximately 45 pages have been used. Courtesy of Thomas Edison National Historical Park.