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arrangement has been adopted, with success, in the case of the Tytam and Po&foolum Waterworks, Hong Kong.
In these cases, however, the interception took place, at
various points, between the storage-reservoirs, and the
filter-beds, so that the waters of the hill streams were
filtered in the main filter beds, which are close to the
town. In the present case, however, the main filter-beds
are near to the storage-reservoir, and consequently, the
water, intercepted along the conduit or main,cannot con-
veniently, be filtered, at the principal filtration-estab-
lishment. For this reason, I recommended the ostablish-
ment of small isolated filter-bods, placed at the various
points of intake, along the line of main. Further, to
facilitate managemeut, I proposed to use the Fischer-
filter, at these minor points of intake.
1
W
As to the Fischer-filter
it: 5
(6) The Fischer-filter does not, I admit,
better, perhaps even not as good purification, as a
well-managed sand-filter;
effect
Band 19 de
but, owing to the ease with which
it is cleaned, it is far more reliable than a sand-filter,
which is not efficiently managed, a condition not easily
obtained, in the case of small and scattered installatious.
For this reason, I auggested the use of these filters, at
the minor intakes. I am, however, of opinion that this
matter is not a very pressing one. Some time must lapso,
before the consumption of water will be so great as to
necessitate the utilisation of all available sources, arid,
consequently, this matter may be left in abeyance for the
present. I maintain, however, that if the water of the
tributary, or intercepted streams, requires filtration,
the Fischer-Filter affords the most efficient means of so
doing, under the special conditions of the case.
3