This notebook covers the period October 1880. The entries are by Edison, Francis Upton, and Francis Jehl. The book contains notes and drawings by Edison regarding tests made of the first 69 lamps from Lot 2. Included also are statistical results by Upton and Jehl. Tests of lamps 70-98 can be found in Menlo Park Notebook #149. The label on the front cover is marked "Lamps Lot 2," "Oct 1880," and "Francis Jehl." The book contains 284 numbered pages.
Blank pages: 30-31.
Courtesy of Thomas Edison National Historical Park.