This notebook is undated with the exception of one entry for March 22, 1881. All of the entries are by Francis Upton. Edison's name or initials appear on many of the entries. The book contains notes, calculations, and a few drawings relating to conductors for the Pearl Street district. The label on the front cover is marked "Conductors." The book contains 284 numbered pages.
Blank pages: 184-277, 280-281. Courtesy of Thomas Edison National Historical Park.