This letterbook covers the period April-September 1890. Most of the correspondence is by Alfred O. Tate. The letters are addressed primarily to James W. Gladstone and James F. Kelly. There are also letters to traveling agent P. M. Randall and to officials at numerous telegraph, railroad, and phonograph companies. The correspondence deals mainly with the marketing of the Edison-Lalande primary battery for use with the telephone and telegraph. Included are items pertaining to customer relations, advertising methods, and agencies in foreign countries. Some letters relate to use of the battery with dental and medical instruments. There are also letters providing cost and performance comparisons between storage batteries and the Edison-Lalande primary battery. The label (partially torn) on the front cover contains the notation "Battery Letter B[ook] Edison Manufacturin[g Co.] Silver Lake, N.[J.] 1890." The book contains 499 numbered pages and an index. Approximately 25 percent of the book has been selected.