28.
effective, by reducing separate pressure, and
by being
mine
easily managed.
bo.
мас
at the
The Committee would suggest self-closing diving traps, which while readily yielding to the pressure of water, could be at all other times closed, and thus prevent the escape of offensive effluvia: and to guard these traps from injury or abuse, nothing more
than a horizontal grating, which effectively prevents large stones or other
is required:
would
drifts entering the sewers
(Wide rough model)
bl.
from the surface
Effective Sewerage is, beyond
all doubt, a main element in the Sanitary
condition of a town, and any proposed system
of drainage for
Victoria, to be
Necessarily embracing such
Sewers as
the
29.
193
following, viz: first class
or main sewers, running generally
East
and West at different levels:- Another or
second class on the main inclines to lead
with the
a third and still smaller
class to lead the side drainage into the
first: second class, the
surface
drains before
as to
referred to being so arranged
to Combine complete flushing of all three
classes with a rapid escape.
Without some such connection
62.
between the
surface
and underground
water
for all
drainage, the present limited supply of other than ordinary purposes,
(except in the rainy season,) would leave
None
available
for Sewerage purposes The main points for consideration,
effective,
must
be
a
classification of
63.