N-07-01-28.2 (1907, 1911-1912)
This notebook contains dated entries from the periods January 1907, June 1907, June 1911, and August 1912. All entries are by Edison. At the beginning of the book are instructions by Edison to F. W. Weber regarding the preparation of iron-tin compounds for storage battery experiments (see also N-07-01-28.1). Most of the book contains notes pertaining to the production and duplication process for disc phonograph records. The front cover is labeled \"Dr. Weber 1907.\"" The pages are unnumbered. Approximately 100 pages have been used."