Apr. 23,19x7 
105 
Flow through Submerged Rectangular Orifices 
of the orifice, and a duplication of the experimental work checked 
the results as given. No explanation is apparent for this isolated 
inconsistency. 
Table I.— Summary of results of experiments, showing the influence of various changes 
in the size of the box and the arrangement of the orifice 
Combination No. 
Size of 
orifice. 
Width of channel 
of approach. 
Depth of water in 
channel of ap¬ 
proach. 
Bottom contrac¬ 
tion. 
Equation of discharge 
curve. 
See text figure 
No. 
Deviation from discharge 
table. 
Depth. 
4 
1 
Head. 
Per cent. 
Head. 
Per cent. 
Ft. 
Ff. 
Ft. 
Ft. 
F/. 
Ft. 
X 
o *5 
1.0 
2.0 
1. 700 
Without.. 
<2=o. 604 a r 2 9 H 0 * 4969 . 
2 
0.03 
+ 3*9 1 
o *75 
0.0 
2 
■5 
i *5 
2-5 
1* 750 
.. .do. 
Q x . 606 a Yiq H ,4934 . 
2 
•03 
+ 3 * 7 
•75 
+ 0.3 
3 
•5 
2.0 
3 *o 
i* 750 
.. .do. 
< 2 = ■ 606 a ^2g H . <933 . 
2 
• 03 
+ 2.3 
•75 
+ 0.4 
4 
•5 
1.0 
2.0 
2. 700 
.. .do. 
<2= • 602 a 1/247 H • 60 ®. 
2 
*03 
+ 0. 5 
•75 
“ o *5 
S 
*5 
i -5 
2-5 
2. 750 
. ..do. 
Q= . 609 a |/2 g H * 5094 . 
2 
*03 
— 1.4 
•75 
4 - 0.6 
6 
•5 
2. 0 
3 *o 
2. 750 
. ..do. 
< 2 = . 605 a V2Q H * 4978 . 
2 
•03 
+ 0. 5 
•75 
+ 0. X 
7 
1. 0 
2. 0 
3 *o 
2.500 
.. .do. 
< 2 = • 629 a |/2 g H * 4987 . 
2 
•03 
+ 3*8 
•75 
+ 2.3 
S 
1. 0 
3-0 
4.0 
2.500 
. ..do. 
<2= . 631 a (/ 2(7 H * 6054 . 
2 
•03 
— 2. 2 
•75 
+ x.8 
9 
1. 0 
4 - 0 
5-0 
2. 500 
.. .do. 
12= .627 a ^2 gH * 4881 . 
2 
• 03 
+ 0.6 
•75 
+ x. X 
IO 
•5 
I. O 
3*0 
r* 750 
. ..do. 
< 2 = • 602 a y : „v H * 4976 . -- 
2 
.03 
+ 3 * * 
•75 
- 0.5 
II 
*5 
1*5 
3*5 
i* 7 So 
. ..do. 
(2= . 603 a Vw H * 6C4 °. 
2 
•03 
“ 0.5 
•75 
— 0. 2 
12 
• 5 
2. O 
4.0 
i* 750 
...do. 
j 2 =* • 605 a \ f 2g H * 4978 . 
2 
• 03 
+ 0.4 
•75 
0.0 
13 
. -5 
I. O 
3*0 
2. 750 
.. .do. 
<2= .605 a VzgH ,5063 . 
2 
•03 
+ 0.7 
•75 
— 0.2 
14 
*5 
1*5 
3*5 
2. 750 
.. .do. 
Q— . 601 a ^2 g H * 6017 . 
2 
•03 
0.0 
•75 
“ 0.4 
15 
•5 
2. 0 
4.0 
2. 750 
.. .do. 
(2= • 602 a ]/2Q H -&027 . 
2 
■03 
- 1.8 
•75 
— 0.6 
16 
1. 0 
2. O 
4.0 
2. 500 
.. .do. 
Q= . 614 a 1/2 g H - 6005 . 
2 
•03 
+ 0.8 
•75 
— 0. X 
17 
1. 0 
3 -o 
5*0 
2. 500 
.. .do. 
Q ■* . 611 a V'zg H * 4876 . 
2 
•03 
+ 0.7 
•75 
— 1.0 
18 
1. 0 
4*0 
6.0 
2. 500 
.. .do. 
< 2 = . 617 a V 2Q H * 4845 . 
2 1 
•03 
+ 0. 2 
•75 
- 0.4 
19 
1-5 
3*0 
5 *o 
2. 500 
.. .do. 
Qr* . 644 a ^2 q H * 4950 . 
2 
.03 
— 0.1 
•50 
+ 1.0 
20 
1-5 
4.0 
6.0 
2. 500 
.. .do. 
<2= • 639 a Vw H * 4805 . 
2 
•03 
4 * 0.1 
.40 
0.0 
21 
1*5 
4*5 
6*5 
2. 500 
.. .do. 
<2= . 638 a H * 4788 . 
2 
*03 
— 1.1 
•35 
—* O. 7 
22 
2- O 
4.0 
6.0 
2. 500 
. ..do. 
< 2 = . 674 a \'2Q H * 4762 . 
2 
*03 
+ 1.6 
•25 
+ x. 6 
23 
2. O 
4*5 
6.5 
2. 500 
.. .do. 
Q= . 692 ay 2g H * 4842 . 
2 
• 03 
- 0.8 
. 20 
+ x *7 
24 
•5 
1. 0 
4.0 
i* 750 
...do..._ 
0 = • 600 a |/2? H * 49fl7 . 
2 
•03 
+ 3*2 
•75 
- 0.8 
25 
•5 
X. 0 
4.0 
2. 750 
...do. 
( 2 = • 599 ay 2 gH * 4977 . 
2 
•03 
•f 2 . 7 
•75 
— x. 0 
26 
i -5 
3*0 
6.0 
2. 500 
.. .do. 
Q= . 623 a H * 4860 . 
2 
•03 
4 - 0. i 
.50 
— 1.6 
27 
. 5 
1.0 
2.0 
1.625 
With. 
j 2™ . 618 a y 2 Q FI * 497 ®...... 
« 
• 03 
4- 6. x 
• 75 
+ 2. 2 
28 
•5 
i *5 
2-5 
1.600 
.. .do. 
12 = . 625 a y 2g H * 6005 . 
O 
3 
•03 
4 " 4 -o 
•75 
+ 3 . 2 
29 
*5 
2.0 
3*0 
1.600 
...do. 
< 2 — .632 a }/2gH * 6005 . 
3 
•03 
+ 3*9 
•75 
+ 4 -S 
30 
*5 
1.0 
2. 0 
2.625 
. ..do... 
< 2 ™ .616a ^2 gH * 6067 . 
3 
.03 
+ 2.7 
•75 
+ 1.6 
31 
*5 
r * 5 
2* 5 
2.600 
.. .do. 
<2— * 621 a Vw H * 6008 . 
3 
• 03 
+ 3*2 
•75 
+ 2.3 
32 
•5 
2. 0 
3 *o 
2. 600 
...do. 
Q=* . 626 a V2g H * 4981 . 
3 
• 03 
+ 3*9 
•75 
+ 3*6 
33 
1. 0 
2.0 
3 *o 
2. 500 
. ..do. 
<2= • 642 a ^2g H * 4958 . 
3 
•03 
+ 7*1 
•75 
+ 4-5 
34 
1.0 
3 -o 
4.0 
2. 500 
.. .do. 
< 2 = . 655 a j/ 2£ H - 4964 . 
3 
• 03 
+ 5*1 
•75 
+ 6.0 
35 
•5 
1*5 
3-5 
2. 600 
...do. 
12 = . 618 a ^2g H - 6019 . 
3 
• 03 
+ 2.4 
•75 
+ 2.0 
36 
•5 
2. 0 
4.0 
2. 60O 
.. .do. 
< 2 = . 620 a )/2Q H * 4987 . 
3 
•03 
4* 2.6 
•75 
+ 2.5 
37 
1.0 
2.0 
4.0 
2. 500 
.. .do. 
( 2 = . 632 a r*g H * 4977 . 
3 
.03 
+ 4*7 
•75 
+ 2.8 
38 
1.0 
3-0 
5.0 
2. 500 
.. .do. 
< 2 = . 632 a yzg H * 4822 . 
3 
• 03 
4- 6. 2 
•75 
+ 2.6 
39 
1. 0 
4*0 
6. 0 
2. 500 
.. .do. 
< 2 = * 635 a 1/2 g H ,4887 . 
3 
•03 
+ 1.7 
•75 
+ 2.5 
40 
1-5 
3 *o 
5 *o 
2. 500 
.. .do. 
<2= .662 a V*qH * 4948 . 
3 
• 03 
+ 3*0 
• 5 ® 
+ 4*0 
41 
i *5 
4-0 
6. 0 
2. 500 
.. .do. 
<2= . 656 a yog H 14847 . 
3 
•03 
+ 1 .X 
.40 
+ 2 - X 
42 
i *5 
4 * 5 
6*5 
2. 500 
.. .do. 
< 2 = * 667 a y2g H - 4860 . 
3 
• 03 
4-0.9 
•35 
+ 3-2 
43 
2.0 
4.0 
6 .0 
2. 500 
.. .do. 
f2= .697 a y2gH * 4810 . 
3 
• 03 
+ 3 * 2 
• 25 
+ 4-3 
44 
2.0 
4*5 
6.5 
2. 500 
...do..._ 
Q— . 685 a y 2g H * 4707 ...... 
3 
•03 
+ 2.9 
. 20 
+ 2.9 
45 
. 5 
x. 5 
3. 5 
x. 600 
.. .do. 
<2= .626 a y2Q u. . 
.0* 
+ I* X 
4* 3. x 
46 
•5 
2.0 
4.0 
X. 600 
.. .do. 
< 2 = . 626 a |/20 H * 4970 . 
3 
.03 
+ 4*3 
• /5 
• 7 S 
+ 3.6 
47 
•5 
r. 0 
4.0 
x. 625 
.. .do. 
<2= . 618 a ^20 H - 6028 .. 
3 
•03 
+ 4*2 
•75 
+ 2.0 
48 
•5 
1.0 
4.0 
2. 625 
.. .do. 
<2= . 612 a yag H * 4992 . 
3 
*03 
+ 414 
•75 
+ 1.2 
49 
•5 
2.0 
10.0 
2- 600 
.. .do. 
(2= • 619 a ^20 // * 4993 . 
3 
.03 
+ 2.3 
•75 
+ 2.4 
50 
•5 
2.0 
10.0 
2. 600 
.. .do. 
(2= * 617 a ^20 AT • B0a0 . 
3 
*03 
+ 09 
•75 
+ I.® 
