Engineering Wonders of the World
Volume III
Forfatter: Archibald Williams
År: 1945
Serie: Engineering Wonders of the World
Forlag: Thomas Nelson and Sons
Sted: London, Edinburgh, Dublin and New York
Sider: 407
UDK: 600 eng- gl
With 424 Illustrations, Maps, and Diagrams
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208 ENGINEERING WONDERS OF THE WORLD.
A 40-inch water main.
(Photo, E. Milner.}
In conclusion, despite the size of the works,
the Water Board are considering extensions
that will be necessary in the future. The
Thames may be drawn upon still further, as
the great chalk beds through which its upper
reaches flow absorb heavy rain like a sponge,
[Note.—The author is greatly indebted to Mr.
Engineer of the Metropolitan Water Board, for assistance given by him
in regard to the preparation, revision, and illustrations of this article ;
also to Messrs. Charles Wall, Limited,
for use of photographs.]
and pass the water out slowly to the river all
the year round. These chalk deposits pro-
duce, in fact, the same effects as a dam,
though in a very different way, and to them
Londoners owe in no small measure the regu-
larity of their water supply.
W. B. Bryant, M.Inst.C.E., Chief