—41 
r 
Discharge Over Rectangular Weirs.— Concluded. 
Depth. H. of Water on Crest 
Measured in still water. 
DISCHARGE IN CUBIC FEET PER SEt^OND. 
With Two Complete Contkactions. 
Correction to be ad¬ 
ded to each of the 
preceding to give 
discharge with no 
contraction. 
In 
Inches. 
In 
Feet. 
3 Feet 
Long. 
5 Feet 
Long. 
10 Feet 
Long. 
18.0 
1.5 
28.7814 
59.3999 
1.8.371 
18.3 
1.525 
29.4729 
60.8604 
1.9146 
18.6 
1.55 
80.1680 
62.3300 
1.9940 
18.9 
1.575 
30.8681 
63.8116 
2.0754 
19.2 
1.6 
81.5717 
65.3022 
2.1588 
19.5 
1.625 
82.2809 
66.8049 
2.2441 
19.8 
1.650 
32.9985 
68.3175 
2.3314 
20.1 
1.675 
33.7093 
69.8393 
2.4207 
20.4 
1.7 
34.4299 
71.3719 
1 2.5121 
20.7 
1.725 
35.1.5i6 
72.9146 
2.60.54 
21.0 
1.750 
35.8827 
74.4672 
2.7009 
21 .3 
1.775 
86,6151 
76.0286 
1 2.7984 
21.6 
1.8 
87.3510 
77.6002 
2.8970 
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 
41.8438 
87.2271 
3.5399 
23.7 
1.975 
. 
42.6045 
88.8635 
3.6.545 
24. 
2.0 
43.3695 
90.5061 
1 3.771 
27. 
2.25 
107 44 
5 06 
30. 
2.50 
125 17 
6 59 
S6. 
3.00 
. 
162.81 
' 10.39 
TABLE VI. 
Discharge Over Cippoletti’s Trapezoidal AVeir of Various Liengths and with Various 
Depths, and Over Rectangular AVelrs Without Side Contraction, 
Formula, D = 3.3^ L . 
For conditions, see pag:e 31. 
Depth of Water 
on (h-est. 
DISCHARGE IN CUBIC FEET PER SECOND. 
In 
In 
1 Foot 
VA Feet 
2 Feet 
8 Feet 
4 Feet 
5 Feet 
10 Feet 
Inches. 
Feet. 
Long. 
Long. 
Long. 
Long. 
Long. 
Long. 
Long. 
.3 
.025 
.0135 
.0202 
.0269 
.0404 
.0539 
.0573 
.1347 
.6 
.05 
.0367 
.0566 
.07.54 
.1131 
.1508 
.1885 
.3771 
.9 
.075 
.06iK) 
.1035 
.1380 
.2071 
.2761 
.34.51 
.6902 
1.2 
.10 
.1064 
.1596 
.2128 
.3192 
.42.56 
.5319 
1.0639 
1.5 
.125 
.1488 
.2232 
.2976 
.4464 
..5962 
.7440 
1.4881 
1.8 
.15 
.19,56 
.2934 
.3912 
.5868 
.7824 
.9780 
L9560 
2.1 
.175 
.2464 
.3697 
.4929 
.7393 
.9858 
1.2322 
2.4644 
2.4 
.20 
.3010 
.4515 
.6020 
.9029 
].2089 
1.5049 
3. <1098 
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 
.4865 
.7282 
.9709 
1.4664 
1.9419 
2.4278 
4.8547 
3.6 
.30 
.6531 
.8297 
1.1063 
1.6594 
2.2126 
2.7657 
6.5314 
3.9 
. 825 
.6238 
.9358 
1.2477 
1.8716 
.2.4954 
8.1192 
6.2384 
4.2 
.o5 
.6972 
1.0469 
1.3945 
2.0917 
2.7890 
8.4862 
6.9724 
4.5 
.875 
.7730 
1.1695 
1.6460 
2.3190 
8.0920 
3.8649 
7.7289 
4.8 
.40 
. 
1.2777 
1.7036 
2.5553 
8.4071 
4.2588 
8.5177 
5.1 
. 42.) 
. 
1.3993 
1.8658 
2.7987 
S.7316 
4.6645 
9.3290 
5.4 
.45 
. 
1.5246 
2.0328 
8.0492 
4.0666 
6.0820 
10.1640 
5.7 
475 
. 
1.6534 
2.2045 
8.3067 
4.4089 
6 5112 
11.0225 
6.0 
.50 
. 
1.7854 
2.3805 
8.6708 
4.7610 
5.9612 
11.9025 
6.3 
. 525 
. 
1.9210 
2.6614 
8.8420 
6.1227 
6.4034 
12.8068 
6.6 
.55 
. 
2.0.599 
2.7465 
4.1198 
5.4980 
6.8663 
13.7326 
6.9 
. 575 
. 
2.2018 
2.9857 
4.4036 
6.8716 
7.3893 
14.6787 
7.2 
.60 
2.3472 
8.1298 
4.6939 
6.2586 
7.8281 
15.6463 
7.5 
.625 
• . • . .... 
2.49.55 
3.3274 
4.9911 
6.6648 
8.8185 
16.6370 
7.8 
.6;) 
.. 
2.6462 
8.5283 
5.2924 
7.0565 
8.8206 
17.6413 
8.1 
.675 
. 
2.8007 
3.7.343 
5.6014 
7.4686 
9.8357 
18.6715 
I 
