This notebook covers the period October 1880. It is a continuation of Menlo Park Notebook #148. The entries are by Edison, Francis Upton, and Francis Jehl. The book contains notes and drawings by Edison regarding tests made of lamps 70-98 from Lot 2. Included also are statistical results by Upton and Jehl along with summaries by Edison and Upton of results from all the lamps in Lot 2. The label on the front cover is marked "Lamps No 2," "No 70-98," "Oct 1880," and "F Jehl." The book contains 284 numbered pages.
Blank pages: 144-181, 192-257, 260-275, 278-283. Courtesy of Thomas Edison National Historical Park.