This notebook, which covers the period March-July 1888, is a continuation of N-88-02-17. The book contains notes by James W. Gladstone regarding tests of chemical compounds for phonograph cylinders, tobacco bleaching, and battery solutions. Inserted into the book are 2 pages, one of which is a list by Edison of solutions. The spine is labeled "62." The pages are unnumbered. Approximately 130 pages have been used.

Courtesy of Thomas Edison National Historical Park.