This book covers the period January 1893-August 1895. It contains a monthly breakdown of labor, material, and overhead costs among experimental projects and other laboratory accounts. The companies to which accounts were charged are sometimes indicated. The book consists of 12 numbered sheets followed by an unnumbered sheet. The front cover is stamped "Abstract of Expenditures No.8. Laboratory T.A. Edison. Orange, N.J."
This book was microfilmed in sections at a reduction ratio of 17:1. Courtesy of Thomas Edison National Historical Park.