This letterbook covers the period June-December 1891. The book contains correspondence, technical reports, and draft manuscripts by Arthur E. Kennelly. Included is material regarding a variety of electrical experiments, such as tests of meters, alternators, transformers, multipolar dynamos, and various insulation compounds. In addition, there are numerous reports concerning the development of streetcar motors and low-horsepower fan motors. The spine is stamped "Letters." The book contains 504 numbered pages. Approximately 20 percent of the documents have been selected. Some of the letters may be difficult to read due to very faint purple ink and bleed- through. Courtesy of Thomas Edison National Historical Park.