From the text ... 'Two maps for each of the four seasons reveal sharp contrasts in the amount of rainfall received in various parts of the United States in wet seasons. Two other maps for each season show the percentage of the seasons which receive large totals, 15 and 20 inches or more. In addition to affording concrete evidence of the widely recognized longitudinal contrasts, especially between the East, Rocky Mountains and Pacific Coast, these maps reveal frequent very heavy rainfalls in the Deep South. Wet seasons have various significant consequences, varying with the region, season and amount. The frequently very wet seasons in the South correlate with the extensive relatively infertile soils, with rapid soil erosion and with low average income and partly with race. It appears likely that wet seasons are even more harmful than exceptionally dry seasons, especially by increasing soil erosion and unwise land use, and, in the warmer areas, reducing human activity.' © 1950 by the Ecological Society of America. Abstract reproduced by permission.