20 
I 
tiful in late summer. Potatoes receive two or three in late summer. 
The land slopes from the canal towards the stream, the fall averag¬ 
ing over the best of the area 20 to 25 feet per mile. 
In order to make a complete study of the water under these 
conditions it was desired to make a complete record of the land and 
the crops under the ditch, with the number of irrigations each was 
given. Though considerable work was expended in this direction 
the record is too incomplete from the means available for this work. 
In 1890 the intake of the canal was taken from the daily gauge 
heights at the headgate taken by Mr. Hendrickson. The record being 
printed in the Annual Report for this Station, as is also that for 
1891, will only be summed in this bulletin. In 1892 the headgate 
was visited weekly, the clock wound and the papers changed’. In 
addition to the record, the company has kindly furnished the gauge 
heights to guard against possible changes in the zero height of the 
instrument. 
Fig. 8 shows the intake for the years 1891 and 1892. The 
scale is too small to distinctly separate the individual days, and' 
therefore the discharges of five consecutive days have been averaged 
for the vertical lines. The record for 1891 is from May 9 to October 
3; for 1892, from April 17 to August 11, when the water became 
too low to record. The quantity used after that date is relatively 
inconsiderable. 
The following tables give the amount of water taken into the 
canal during the various months of the irrigation season. Some 
water is turned into the ditches early in the season very frequently, 
and it is kept running as late as water is available, but the water is 
used principally for purposes other than irrigation. In the aggre¬ 
gate the amount is not important, and would not appreciably alter 
the results of the tables. The second of the two tables shows the 
difference in the results obtained in the nominal duty according to 
the period considered as the season for irrigation. Even in the 
month of June, which, as shown by the intake, andlby the'^preceding 
diagrams, is the month when water is used the most freely, the duty 
of a cubic foot per second from the canal has not fallen below 65 
acres during the past three years. 
