This notebook covers the period August-December 1886. The entries are by Edison and John F. Ott. The book contains notes and drawings relating to the design of the municipal lamp, apparatus for carbonizing and bulb blowing, and the phonoplex. The spine is labeled "32." The book contains 20 numbered pages followed by 17 unnumbered pages. There is also one unnumbered page at the beginning of the book.

Blank pages: 39-40, 47-48, 73-74, 203.

Courtesy of Thomas Edison National Historical Park.