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value of H. It is evident that the following expression will then
from which, according to Eq. (2),
In taking into account this last relationship, Eq. (2) will take
The actual quantity of gas Q flowing under the inverted weir
will be less than the theoretical volume by reason of the frictional
and other resistance; therefore these equations will become:
in which the coefficients p, and « may not be equal, as, in passing
from equations (3) and (4) to the actual flow of the gas, it will be
found that the relation between H and h is different from that
given in these equations.
According to the researches of Bazin, the coefficient M for the
flow of water is given by the formula
|^|M= [0.70+0. 185|] [0.
in which p is the depth of the channel and E& must not be less
than |ff .
« E being the distance DD (Fig. 25).