This letterbook covers the period December 1890-June 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, multipolar dynamos, alternators, batteries, and cable for the electric railway. 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 501 numbered pages. Some pages have been removed from the book. Approximately 30 percent of the documents have been selected. Some of the letters may be difficult to read due to faint purple ink and bleed-through. Courtesy of Thomas Edison National Historical Park.