13 
The first column gives the date on which water was applied to 
the crop, and the second the number of hours during which the water¬ 
ing lasted. The alfalfa and clover is generally watered once for 
each cutting. The north wheat was cut about August 16, the first 
cutting of alfalfa and clover the last week of June, the second cut¬ 
ting a month later, and the third cutting was begun September 23. 
The rainfall during the growing season was: In April, 1.60 inches; 
May, 5.22 ; June, 2.02 ; July, 1.04 ; August, .19 ; September, .07, which 
reduced to feet is added to the depth artificially applied. The duties 
as obtained for a constant flow of cubic foot per second then varies 
according to the assumed length of the season^ and whether the 
rainfall is or is not considered, varying from 12 to 400 acres per 
second-foot. 
Fig. 3. —Depths op Water Applied by Months, 1892, by J. H. McClelland. 
Fig. 3 represents graphically the depths of water received by 
each crop by months, that received from irrigation being represented 
by the black part of the diagram, the rainfall by the light portion. 
WHEAT. 
The field which was used for measuring the water supplied 
for irrigation was one some six miles southeast of the Station, 
and three miles directly east of the field of Mr. McClelland. 
The field belonged to Mr. Walter Campbell, of the firm of* Ames & 
Campbell, of Fort Collins and Denver, and an able farmer. The field 
slopes to the north and east, toward the river, as is shown by the 
map, Fig. 4, is of friable sandy loam, retentive of moisture, and in a 
section well-known for the quality of the wheat. The farm build¬ 
ings stood in the southwest corner of the tract. The main supply¬ 
ing lateral ran to the north along the west side of the tract, and the 
distributaries to the east at intervals of about 200 feet. The meas¬ 
uring box and the recorder were at A, in the right hand 
lower corner. The water for the first section of the field, 
consisting of 3.1 acres, was not measured through this box, 
