The one dated entry in this pocket notebook is from November 10. It was used by Edison in 1920 for notes regarding experimental work, business matters, and other tasks to be performed. Most of the experimental entries pertain to storage batteries, including notes on battery regeneration and automobile starters. The business-related entries include notes on payroll, production efficiency, battery production problems, battery sales summaries, and labor layoffs for efficiency. Also included is the outline of a plan to reorganize the Edison Storage Battery Co. into fifteen departments. The pages are unnumbered. Approximately 30 pages have been used. Courtesy of Thomas Edison National Historical Park.