This notebook covers the period August 1880-January 1881. The entries are by Francis Upton. The book contains calculations, along with occasional notes and drawings, relating to tests of dynamos and motors. There are also a few notes and calculations relating to lamps, meters, and tests of German silver wire. The label on the front cover is marked "Upton," "Motors," and "Machines." The book contains 284 numbered pages.
Blank pages: 2-3, 8-15, 18-19, 172-173, 206-275, 284. Courtesy of Thomas Edison National Historical Park.