16 
NATIVE MEADOW. 
Capt. Wm. M. Post kindly allowed us to measure the water ap¬ 
plied to a field represented in Fig. 6, devoted to native hay.. The field 
is within the foothills, near the gauging station of the Poudre river, 
and contains below the position of the measuring box, some sixty 
acres. The portions inclosed by dotted lines were devoted to onions, 
corn, and an inclosure for hay corral, a total of 1.6 acres, and there 
Fig. 6. 
were 4.2 acres of wheat at the extreme upper part of the field. The 
lines of the map show the contours of the field, at two feet differences 
of level, the double lines representing the ditches, those at the lower 
part of the map being ditches to catch the seepage water. The 
lower part of the field is so wet .that no irrigation is required, 
and none is given except with the waste water from the upper 
ground. The total area of meadow which is irrigated is 32 acres. 
The field is in an ancient bed of the river, so that gravel sub-soil is 
close to the surface. The total amount of water measured includes 
that given to the 32 acres of meadow, and to 4.2 acres of wheat, 1.6 
acres of corn, 0.3 acres of onions, or a total of 38 acres. The in¬ 
strument was put in place in 1891, and measured the water which 
ran in the latter part of that year, as well as during the whole of 
1892. Fig. 7 shows graphically the amount applied expressed in 
depths over the area mentioned, the light portion representing 
the rainfall and the dates on which it-fell. This is taken from the 
record furnished by Chas. Gilkison, five miles southeast of the field. 
The rainfall at that place is slightly smaller than in the foothills, 
