Report to the directors of the London and Birmingham railway company, accompanied by Experiments on the transverse strength, &c. of malleable iron, with reference to its use for railway bars
Peter Barlow. "Report to the directors of the London and Birmingham railway company, accompanied by Experiments on the transverse strength, &c. of malleable iron, with reference to its use for railway bars." Journal of the Franklin Institute 20.4 (1835) 264-275