--------------------------------------+---------------------------
H Measured in | Feet. | Inches.
---------------+-----------+----------+-----------+---------------
| Gallons | C. ft | Gallons | C. ft
Discharge in | per hour. | per min | per hour. | per min
---------------+-----------+----------+-----------+---------------
Authority. | | | |
Box | 79,895 | 213.6 | 1,922 | 5.13
Cotterill | 74,296 | 198.6 | 1,787 | 4.78
Francis | 74,820 | 200.0 | 1,800 | 4.81
Mo'esworth | 80,057 | 214.0 | 1,926 | 5.15
Santo Crimp | 72,949 | 195.0 | 1,755 | 4.69
---------------+-----------+----------+-----------+---------------

In the foregoing table Francis' short formula is used, which
does not take into account the end contractions and therefore
gives a slightly higher result than would otherwise be the
case, and in Cotterill's formula the notch is taken as being
half the width of the weir, or of the stream above the weir. If
a cubic foot is taken as being equal to 6-1/4 gallons instead
of 6.235 gallons, then, cubic feet per minute multiplied by
9,000 equals gallons per day. This table can be applied to
ascertain the flow through the notch shown in Fig. 13 in the
following way. Suppose it is required to find the discharge in
cubic feet per minute when the depth of water measured in the
middle of the notch is 4 in Using Santo Crimp's formula the
result will be

C\/H^3 = 4.69 \/4^3 = 4.69 x 8 = 37.52