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Assertion details
Summary
river
provide
1
still-water navigation
1 triples in cluster
river
provide
still-water navigation
1
1 source sentences
Source: Shown
Subject: Shown
Predicate: Shown
Object: Shown
Facet: Shown
SRC
A
river
is
thereby
converted
into
a
succession
of
fairly
level
reaches
rising
in
steps
up
-
stream
,
providing
still
-
water
navigation
comparable
to
a
canal
;
but
it
differs
from
a
canal
in
the
introduction
of
weirs
for
keeping
up
the
water
-
level
,
in
the
provision
for
the
regular
discharge
of
the
river
at
the
weirs
,
and
in
the
two
sills
of
the
locks
being
laid
at
the
same
level
instead
of
the
upper
sill
being
raised
above
the
lower
one
to
the
extent
of
the
rise
at
the
lock
,
as
usual
on
canals
.