This ledger covers the period May 1888-May 1892. As the account book of final entry, it summarizes transactions relating to the manufacture of phonographs. The spine is stamped "Ledger No 1. Edison Phonograph Works" and is labeled "May 1st 1888 to May 31st 1892." The book contains 912 numbered pages, many of which are blank, and an index. The last entry appears on page 770.
This book was microfilmed at a reduction ratio of 16:1. Courtesy of Thomas Edison National Historical Park.