776 [=137] (V.2)

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Status: Complete

776

to those before described, they con-
-stitute the heads of the two terminal
lines into which the main trunk
is divided on its reaching the 180th
mile of its course. Whereas, therefore,
the Futtigurh, Bolundshuhur, and
Koel Branch Heads may be
considered as subordinate to the
works on the main trunk, those
that I am now about to describe
are a component part of it. The
position of the 2 heads with
reference to the main canal
on its approach to the point
of separation, is laid down
with a view to obtaining for
each of them, an equal supply
of water. For this purpose, the
longitudinal axis of the main
canal, bears centrically upon the
salient angle which separates
the two heads; the axis in fact bi-
-sects the salient angle, and by
so doing, gives an equable ad-
-justment to the current in its
bearing upon the two heads. The
slopes of the canal bed being
equal vizt. 15 inches per mile; the
angle of incidence and departure
being adjusted as before [said, struck through] described,
and the capacities of the bays
of the regulating bridges them-
-selves being of equal dimensions;
the effects of the wear upon the
beds of the channels immediately
below the bridges, appear[s, struck through] to be
the only probable [contingency, struck through] source of
[from, struck through] disarrangement.

The canal supply on its
reaching the Nanoon Fork
will amount to 3250 cubic feet
per second; and it is supposed
that

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