Drawing of The Gauge Trials of 1846

Comparative end views of Stephenson's engine "A" and a broad gauge engine "Ixion" of the Great Western Railway which competed in the gauge experiments. From the drawing by David Joy preserved at the the Institution of Mechanical Engineers. Description from A Century of Locomotive Building by Robert Stephenson & Co 1823-1923, J G H Warren, p 372. Drawing reference - 100A.