Eastwick and Harrison, 1836
Source John White, Jr.
Campbell's plan was materially improved by Eastwick and Harrison, also of Philadelphia, whose subsequent running gear modification made the eight-wheel truck locomotive a national standard. This style of locomotive was to remain a universal favorite in this country until late in the century. The Hercules was completed 1836-1837 for the Beaver Meadow Railroad. In the drawing it is shown after being fitted with Harrison's patented equalizing lever.