Discharge Over Rectangular Weirs.— Concluded, 
Depth, H, of Water on 
Crest Measured in 
still water 
DISCHARGE IN CUBIC FEET PER SECOND 
With Two Complete Contractions 
Correction to be 
added to each 
In 
Inches 
In 
Feet 
3 Feet 
Long:. 
5 Feet 
Long. 
10 Feet 
Fong. 
of the preced¬ 
ing to give dis¬ 
charge with no 
contraction. 
18.0 
1.5 
28.7814 
59.3999 
1.8371 
18.3 
1.525 
29.4729 
60.8604 
1.9146 
18.6 
1.55 
30.1680 
62.3300 
1.9940 
18.9 
1.575 
30.8681 
63.8116 
2.0754 
19.2 
1.6 
31.5717 
65.3022 
2.1588 
19.5 
1.625 
32.2809 
66.8049 
2.2441 
19.8 
1.650 
32.9935 
68.3175 
2.3314 
20.1 
1.675 
33.7093 
69.8393 
2.4207 
20.4 
1.7 
34.4299 
71.3719 
2.5121 
20.7 
1.725 
35.1546 
72.9146 
2.6054 
21.0 
1.750 
35.8827 
74.4672 
2.7009 
21.3 
1.775 
36.6151 
76.0286 
2.7984 
21.6 
1.8 
37.3510 
77.6002 
2.8979 
21.9 
1.825 
38.0909 
79.1814 
2.9996 
22.2 
1.85 
38.8346 
80.7726 
3.1034 
22.5 
1.875 
39.5812 
82.3717 
3.2093 
22.8 
1.9 
40.3321 
83.9816 
3.3173 
23.1 
1.925 
41.0860 
85.6005 
3.4276 
23.4 
1.95 
41.8436 
87.2271 
3.5399 
23.7 
1.975 
42.6045 
88.8635 
3.6545 
24. 
27. 
30. 
36. 
2.0 
2.25 
2.50 
3.00 
43.3695 
90.5061 
107.44 
125.17 
162.81 
3.771 
5.06 
6.59 
10.39 
TABLE VI. 
Discharge Over Cippoletti’s Trapezoidal Weir of Various Lengths and with 
Various Depths, and Over Rectangular Weirs Without Eud Contraction. 
Formula, D— 3 . 3 ^ L, H 3/2 
Depth of Water 
DISCHARGE IN CUBIC FEET PER SECOND 
on 
In 
Inches 
crest 
In 
Feet 
1 Foot 
Fong 
lK Feet 
Fong 
2 Feet 
Fong 
3 Feet 
Fong 
4 Feet 
Fong 
5 Feet 
Fong 
10 Feet 
Fong 
.3 
.025 
.0135 
.0202 
.0269 
.0404 
.0539 
.0673 
.1347 
.6 
.05 
.0367 
.0566 
.0754 
.1131 
.1508 
.1885 
.3771 
.9 
.075 
.0690 
.1035 
.1380 
.2071 
.2761 
.3451 
.6902 
1.2 
.10 
.1064 
.1596 
.2128 
.3192 
.4256 
.5319 
1.0639 
1.5 
.125 
.1488 
.2232 
.2976 
.4464 
.5952 
.7440 
1.4881 
1.8 
.15 
.1956 
.2934 
.3912 
.5868 
.7824 
.9780 
1.9560 
2.1 
.175 
.2464 
.3697 
.4929 
.7393 
.9858 
1.2322 
2.4644 
2.4 
.20 
.3010 
.4515 
.6020 
.9029 
1.2039 
1.5049 
3.0098 
2.7 
.225 
.3592 
.5388 
.7184 
1.0777 
1.4369 
1.7961 
3.5922 
3.0 
.25 
.4208 
.6312 
.8417 
1.2625 
1.6833 
2.1041 
4.2083 
3.3 
.275 
.4855 
.7282 
,9709 
1.4564 
1.9419 
2.4273 
4.8547 
3.6 
.30 
.5531 
.8297 
1.1063 
1.6594 
2.2126 
2.7657 
5.5314 
3.9 
.325 
.6238 
.9358 
1.2477 
1.8715 
2.4954 
3.1192 
6.2384 
4.2 
.35 
.6972 
1.0459 
1.3945 
2.0917 
2.7890 
3.4862 
6.9724 
4.5 
.375 
.7730 
1.1595 
1.5460 
2.3190 
3.0820 
3.8649 
7.7299 
4.8 
.40 
1.2777 
1.7035 
2.5553 
3.4071 
4.2588 
8.5177 
5.1 
.425 
• ••••• 
1.3993 
1.8658 
2.7987 
3.7316 
4.6645 
9.3290 
5.4 
.45 
••••••• 
1.5246 
2.0328 
3.0492 
4.0656 
5.0820 
10.1640 
5.7 
.475 
. 
1.6534 
2.2045 
3.3067 
4.4089 
5.5112 
11.0225 
6.0 
.50 
1.7854 
2.3805 
3.5708 
4.7610 
5.9512 
11.9025 
6.3 
.525 
1.9210 
2.5614 
3.8420 
5.1227 
6.4034 
12.8068 
6.6 
.55 
• • • 
2.0599 
2.7465 
4.1198 
5.4930 
6.8663 
13.7326 
6.9 
.575 * 
. 
2.2018 
2.9357 
4.4036 
5.8715 
7.3393 
14.6787 
7.2 
.60 
2.3472 
3.1293 
4.6939 
6.2585 
7.8231 
15.6463 
7.5 
.625 
••••••• 
2.4955 
3.3274 
4.9911 
6.6548 
8.3185 
16.6370 
7.8 
.65 
••••••• 
2.6462 
3.5283 
5.2924 
7.0565 
8.8206 
17.6413 
8.1 
.675 
••••••• 
2.8007 
3.7343 
5.6014 
7.4686 
9.3357 
18.6715 
