The Colorado Statute Inch 
5 
even below the amount which had been purchased. Sometimes the head 
was maintained by having a check in the ditch, but when the amount of 
water in the ditch was small, this was generally prohibited, as those at the 
upper end of the ditch would receive their full amount and those at the 
lower end would get practically nothing.” 
The results of the experiments with tube-boxes are given in table 1. 
The boxes were 16 feet long and were given a descending grade of ^-inch 
to the foot. The discharge end was therefore 2 inches lower than the 
intake end. Metal strips y 8 inch thick were placed around the intake end 
of each box so the inside dimensions of the orifice could be accurately de¬ 
termined. The inside depth of the box was practically 6 inches in every 
case and the water surface was 5 inches above the top of the orifice. So 
far as the law is concerned, the width of the box need not be the same 
as the width of the orifice, and experiments were therefore made with dif¬ 
ferent widths of boxes for each width of orifice. A thin metal slide was 
made to fit between the metal strips on the end of the box, and this was 
adjusted to give any width of opening from 2 to 16 inches. 
TABLE 1. 
RESULTS OF EXPERIMENTS WITH COLORADO STATUTE INCH DEVICES 
(TUBE BOX). 
| Discharge in Cubic Feet per Sec. 
Orifice 
No. of 
Exper- 
ment 
D 
Depth 
in 
Inches 
B 
Breadth 
in 
Inches 
Nominal 
Area 
in Sq. 
Inches 
Width 
of Box 
Inches 
| Observed 
By 
| Experi- 
| ment. 
Cor¬ 
rect’d for 
Nominal 
Area 
Curve | 
Value 
Statute 
Inches 
to One 
Sec. Ft. 
2738 
6.025 
2.002 
12 
2 
.348 
.346 
.345 
34.8 
2739 
6.028 
2.004 
12 
2 
.347 
.345 
.345 
2740 
6.053 
2.005 
12 
4 
.347 
.343 
.343 
35.0 
2741 
6.053 
2.005 
12 
4 
.346 
.342 
.343 
2745 
6.059 
2.002 
12 
6 
.344 
.340 
.341 
35.2 
2746 
6.059 
2.002 
12 
6 
.343 
.339 
.341 
2751 
6.068 
2.000 
12 
8 
.352 
.348 
.346 
34.7 
2752 
6.068 
2.000 
12 
8 
.351 
.347 
.346 
2777 
6.058 
2.005 
12 . 
14 
.343 
.339 
.338 
35.5 
2778 
6.058 
2.005 
12 
14 
.341 
.337 
.338 
2791 
6.052 
2.000 
12 
16 
.359 
.356 
.356 
33.7 
2792 
6.052 
2.000 
12 
16 
.360 
.357 
.356 
2807 
6.034 
2.004 
12 
16 
.358 
.355 
.354 
33.9 
2809 
6.034 
2.004 
12 
16 
.357 
.354 
.354 
2743 
6.040 
3.995 
24 
4 
.647 
.643 
.643 
37.3 
2744 
6.040 
3.995 
24 
4 
.646 
.643 
.643 
2747 
6.042 
3.997 
24 
6 
.658 
.654 
.653 
36.8 
2748 
6.041 
3.999 
24 
6 
.656 
.652 
.653 
2753 
6.057 
4.002 
24 
8 
.664 
.657 
.658 
36.5 
2754 
6.057 
4.002 
24 
8 
.664 
.657 
.658 
2759 
6.062 
3.998 
24 
10 
.666 
.659 
.661 
36.3 
2760 
6.062 
3.998 
24 
10 
.667 
.660 
.661 
2767 
6.072 
4.001 
24 
12 
.672 
.664 
.664 
36.1 
2768 
6.072 
4.001 
24 
12 
.673 
.665 
.664 
2779 
6.058 
3.999 
24 
14 
.665 
.659 
.658 
36.5 
2780 
6.058 
3.999 
24 
14 
.663 
.657 
.658 
2793 
6.054 
4.004 
24 
16 
.671 
.664 
.663 
36.2 
2794 
6.054 
4.004 
24 
16 
.670 
.663 
.663 
