This notebook was used between November 1879 and November 1895. All of the entries are by Charles Batchelor The name of Martin N. Force appears occasionally as a witness. The material relates primarily to the electric light, the telephone, electric traction, and chemical and metallurgical experiments. There are some entries pertaining to spiritualism and to unusual phenomena. Included also are lists of books read by Batchelor and a list of electric light articles and patents from the 1840s through the 1880s. An index to correspondence, probably dating from the 1890s, can be found at the end of the book. The book contains 109 pages, numbered by an archivist. There is one unnumbered page between pages 86 and 87.

Blank pages: 51, 103-109.