Distribution of rainfall, by H. Gannett.
Floods, by M.O. Leighton.
Developed water powers, compiled under the direction of W.M. Steuart, with discussion by M.O. Leighton.
Undeveloped water powers, by M.O. Leighton.
Irrigation, by F.H. Newell.
Underground waters, by W.C. Mendenhall.
Denudation, by R.B. Dole and H. Stabler.
Control of catchment areas, by H.N. Parker.