" We would not like to imitate his naive reasoning,
and yet, for defending the very original system proposed by Mr.
Froideville, we have only our conviction, which we share, moreover, with a
large number of sea-faring men and engineers. Mathematics are powerless to
predict to us with accuracy the manner in which the floating breakwaters
will behave, but experiment remains. Let the promoter of the project,
then, be given authority to inclose a few hundred meters, and if, as we
suppose, the breakwaters shall remain immovable in a northwester, a
maritime revolution will have been brought about.--_La Nature._
* * * * *
IMPROVED CATCH BASIN.
In 1882, M. Bacle published in _Le Genie Civil_ a study of the sewer
systems in some of the large foreign cities. There may be found there a
description of the Liernur system at Amsterdam, Leyden, and Dordrecht, in
Holland, and in certain cities of Germany and the United States.
[Illustration: IMPROVED CATCH BASIN.]
This system consists in the employment of two distinct systems of ducts,
one for the discharges from water-closets and the other for household
wastes, rain water, and the discharges from factories when sufficiently
purified. This arrangement allows the employment of sewers of small
section, provided that it shall be unnecessary to enter them for the
purpose of cleansing them.
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