CEREAL EXPERIMENTS AT DICKINSON, N. DAK. it 
tion. These ratios for the different years compared with the average 
ratio for the entire period offer an excellent basis for judging the 
seasonal conditions under which the experiments reported in this 
bulletin were conducted. 
BWR UTA ED MR. AWE 7I9I¥ SUNME SOLE AUG. SEP OC7 MOK LETC. 
me ee i es 
v5 Ri A a Ce ea ee 
N 
INCIES OF RECITATION. 
\ 
eo EP cepeees 
lic. 2.—Graph showing the average monthly precipitation for the 22 years from 1892 
to 1918, inclusive, at Dickinson, N. Dak. 
WIND. 
The anemometer used at the Dickinson substation was not ob- 
tained until June, 1908, and for that reason the records of the wind 
for 1907 and for May, 1908, are not available. Complete records 
for April were not taken except for the years 1912 and 1913, when the 
averages were 8.4 and 9.4 miles, respectively. Since June, 1908, a 
complete record of the wind during four months of the growing 
season has been kept. The anemometer stands next to the evapora- 
tion tank at a height of about 2 feet from the surface of the ground. 
