Discussion of the papers of C.P. Sandberg on "Rail specifications and rail inspection in Europe", of C.B. Dudley on the "Wearing capacity of steel rails in relation to their chemical composition and physical properties" and of A.L. Holley on "Rail Patterns"

by A. Welch, R. W. Hunt, W. Sellers, W. R. Jones, R. H. Sayre, A. Wendel, W. R. Hart, J. W. Cloud, J. Reese, C. E. Stafford, O. Chanute, C. B. Dudley, T. Egleston