770 [=131] (V.2)

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Status: Complete

770

justice to the design, simple as
it is, and as it ought to be.

The above is a general out-
-line of the whole of these works
which vary in no material de-
-gree beyond that of extent of
waterway to the bridges, and
in the value of the angle of
departure.

The regulator over the main
canal at the Futtigurh Bfranch
Head, has 9 bays of 20 feet in
width each, the height of each
bay being 17 feet fromt the floor-
-ing to the soffit of the arch.
That over the branch head has
4 bays of the same dimensions.
The maximum height of
water with a full supply in
the canal is equal to 10 feet,
in which case the lower 7 feet
of the branch bays would be
closed, so as to admit of the
full quota having given to it by
an overfall 3 feet in depth flow-
-ing, weir fashion, over the tops
of the sleepers. A depth of 3 feet
falling freely as in the above case
from a reservoir would give
a discharge per second for each
20 feet opening equal to 352.92
cubic feet, or for 4 openings 1411.68
cubic feet per second, the legitimate
supply being 1240. I have not
thought it worthwhile, however,
to graduate the discharges below
equal depths of six inches; a
division which for all practical
purposes will, for some time at
least, be sufficient. With 4
bays at the superintendent's dis-
-posal, however, he will be able
to

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