OF 1877 Typical Horse Car-Penn Avenue to Lawrenceville. 1888 Daft Overhead electric trolley system-Carson St. to Knoxville. 1889 Bentley-Knight Underground electric trolley car-Federal St., Allegheny. PITTSBURGH'S EARLY CONTRIBUTIONS TO THE ART OF SURFACE TRANSPORTATION. By courtesy of Geo. T. Fleming and W. C. Hagan. HONORABLE WILLIAM A. MAGEE, Mayor of the City of Pittsburgh. BY BION J. ARNOLD, Consulting Engineer PITTSBURGH, PENNSYLVANIA DECEMBER, 1910 |