This notebook covers the period December 1887-May 1888. Most of the book consists of tests made on Lalande batteries by an unidentified experimenter. At the beginning of the book are 10 pages of notes by Edison, dated December 8-10, containing instructions for chemical experiments on lamp filaments, phonograph cylinders, magnetic iron ores, and other materials. Following Edison's notes are 3 pages by Arthur E. Kennelly, possibly listing laboratory projects involving technologies such as the telephone and the pyromagnetic generator. The front cover is labeled "Lalande Battery." The spine is labeled "029.4." The pages are unnumbered, and the book has been used in both directions. Approximately 150 pages have been used.
The Lalande battery test notes have not been selected. Courtesy of Thomas Edison National Historical Park.