This time book covers the period August 1872-June 1873. It lists the hours and pay of each employee. Some pay period entries bear notations indicating the amount of money received from J.T. Murray to meet the payroll. There are drawings on the inside front cover and first page. The cover of this pocket notebook is marked "T.A. Edison Time Book Room No. 1, 2, 3, & 4." The book is unnumbered. Approximately 110 pages have been used. Courtesy of Thomas Edison National Historical Park.