This notebook covers the period August-September 1880. It was used by various members of the laboratory staff to record notes and drawings relating to tests of lamps, carbons, and vacuums. The label on the front cover is marked "Book for lamps Sep 3, 1880." The book contains 284 numbered pages.

Blank pages: 26-27, 52-91, 104-109, 116-125, 128-231, 238-239, 242-259, 262-281.

Courtesy of Thomas Edison National Historical Park.