PRUYN, FRANCIS L.

Earth pressure and stability. 398.

PURDON, C.D.

Locomotive performance on grades, 329.

RANDOLPH, BEVERLY S.

"Locomotive Performance on Grades of Various Lengths." [321].

RICHARDS, JOSEPH T.

"Final Report of Special Committee on Rail Sections." [456].

ROBERTS, PERCIVAL, Jr.

"Final Report of Special Committee on Rail Sections." [456].