Volume 3 in this series covers the freight service that many interurbans developed to help increase revenue. Some handled only a modest package business but several expanded into carload interchange with connecting railroads and other interurbans. They often combined good service with innovative equipment and operating practices to make interurban freight service a surprisingly successful business. This volume discusses these freight services in detail as well as the equipment itself: box motors, freight trailers, Baldwin-Westinghouse locomotives, GE locomotives, Illinois Traction and Illinois Terminal locomotives, Oklahoma Railway's steeple cabs, Oregon Electric's four-truck locomotives, and different items built in-house. Illustrated throughout with black and white photos and detailed schematic diagrams. Also includes an extensive (28 pages) technical Appendix, "Inside the Interurban Car," detailing the parts and equipment of the cars and locomotives. This book contains pp. 446-628 of "The Interurbans." With bibliography and index.