The history of public health, 1871-1921, by S. Smith.--The American Public Health Association, past, present, future, by M.P. Ravenel.--The story of public health in Canada, by P.H. Bryce.--The history of bacteriology and its contribution to public health work, by F.P. Gorham.--American mortality progress during the last half century, by F.L. Hoffman.--The United States quarantine system during the past fifty years, by H.S. Cumming.--History of state and municipal control of disease, by C.V. Chapin.--Fifty years of water purification, by G.C. Whipple.--Sewage and solid refuse removal, by R. Hering.--Stream pollution by industrial wastes and its control, by E.B. Phelps.--Progress in Federal food control, by C.L. Alsberg.--Food conservation, by S.C. Prescott.--Milk and its relation to public health, by C.E. North.--The history of child welfare work in the United States, by P. Van Ingen.--Housing as a factor in health progress in the past fifty years, by L. Veiller.--What fifty years have done for ventilation, by G.T. Palmer.