THE hurricane which visited New England in September 1938 is rather artlessly described in a massive volume of 562 pp. as “the greatest catastrophe since settlement by the white man”*. The loss of life was very heavy and the material damage by flood, wind and wave exceeded three hundred million dollars. The greater part of the damage was caused by flooding of the rivers resulting from heavy rain, and coming so soon after the great floods of March 1936 it caused much alarm. The U. S. Geological Survey has accordingly collected all the available information about rainfall and river-levels as a basis for the design of protective measures for the future.