This letterbook covers the periods March-April 1890 and September 1890-February 1891. Most of the correspondence is by Alfred O. Tate. The letters are addressed primarily to James W. Gladstone and James F. Kelly. There is also correspondence with long-time Edison associate Luther Stieringer regarding battery tests conducted by Stieringer in New York. The correspondence deals mainly with the marketing of the Edison-Lalande primary battery for use with the telephone and telegraph. Included are documents pertaining to customer relations, advertising methods, and agencies in foreign countries. Some of the letters relate to use of the battery in nickel-in-the-slot phonographs, medical equipment, and electric lighting; a few letters concern its use in the talking doll and phonoplex. The front cover is labeled "Edison Manufacturing Co. Silver Lake, N.J 1890-1891." The book contains 499 numbered pages and an index. Approximately 25 percent of the book has been selected.