IOWA ACADEMY OF SCIENCE 
83 
Maps showing distribution of Wheat and Grain rust for a favorable, and an 
unfavorable year. See accompanying United States maps for weather, 1901 and 1904. 
Total Precipitation for the Crop Season of 1901, March 1-September 30. 
Departures from Normal Precipitation for the Crop Season of 1901, March 1- 
September 30. Shaded portions show excess ( + ), and unshaded portions deficiency 
( — ) of rainfall over areas bounded by light lines. 
