340 



THE SMALL GRAINS 



FIG. 104. Map showing the average monthly precipitation in the 

 Great Plains and Western area of the United States. Each rectan- 

 gular diagram represents the precipitation at one station, beginning 

 at the left with January and showing monthly averages. The black 

 columns in each diagram, therefore, give the precipitation averages, 

 although the details are too small on this size of page to be seen ; but 

 the differences of summer and winter rainfall on the Great Plains 

 and the far Western area, which is the point here to be brought out, 

 are clearly shown. 



