Sacramento daily record-union. [volume] (Sacramento [Calif.]) 1875-1891, 1883-09-29

manipulating the valves. 10 the case OF
the Shone system the operation is auto
matte, and requires no attention. When
the tank gets full the inlet valves are
closed, the compressed air is turned on, the
| sewage is driven out, and the tank made
ready to receive more sewage automatically.
In the case of both systems the matter
! of grades or fall Of the pipes, as is peces-
sary in any system where the sewage flows
in pipes by the force of gravity alone, is
immaterial indeed, the pipes may, With
out detriment, except the consumption of
little extra power, run on up grades as
well as on down grades or slopes. But in
the Liernur system the power is neces-
sarily limited, while in the Shone system
it may be multiplied and held in reserve
TO any desired amount
It is in this respect wherein the pneu-
matte systems of sewerage possess greater
and unquestioned advantages over any
gravity system, and wherein the Shone
system exceeds all others in its adaptable
ity of application TO low aud fiat SITES
In the Shone system the local or neigh
borhood tanks are put near enough to-
gether and deep enough underground
(eight to twelve feetl to admit of good
/
from the houses of the adjacent blocks,
and these pipes need never exceed six
inches in diameter, or be laid more than
six or seven feet as q maximum, and four
feet as an average below the street surface.
Under these circumstances extreme econ
omy in construction and perfect efficiency
Of operation are insured to the point of
collecting the sewage into the local tanks.
Then, IN this system, the pipes leading
from the local tanks being operated under
pressure, are retained at sizes less than six
inches, and can follow the uudulations of
the ground along their route, being laid
only deep enough two or three feet below
the surface) to protect them from injury !;
whereas, in a gravity system, the pipes
must necessarily be of larger dimensions
and set on sucn grades or slopes as mecca
states great cost for excavation in laying
them, unless the ground has sufficient fall
for the required slope.
In my Judgment the efficiency of the
Shone system, or of some system involving
the principles on which it is founded, is
undoubted, and its economy for adaptation
TO low and fist eites may be readily shown.
1t is not too much to say that the adoption
of this principle in the movement of sew
age, and the application of the sewage to
land in irrigation, as have heretofore set
forth in detail, together furnish the desired
solution to the sewage and sewerage prob
lens for interior sites, such as California
presents so many of.
But when we have come to this point,
we have only just begun the study of the
subject. As 1 have before shown, the use
of sewage in irrigation on land may prove
total failure and produce the worst re-
suits. Sewage irrigation is an operation
to be prepared for with care and knowl.
edge, and to be prosecuted with judgment
And SO a pneumatic system of sewerage
is a delicate scientific machine, to be
planned and executed under the supervi-
sion of one who has knowledge of physics,
mechanical movements and construction
No more perfect failure and complete waste
of money might be made than by attempt.
ing to carry out pneumatic sewerage
works as sewerage systems have heretofore
been put in operation in California.