SCIENCE AND INDUSTRY. ~ 
The Yanco irrigation scheme promises a fulfilment of these long- 
cherished hopes. It possesses all the broad, natural features essential 
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to successful development. 
The human factor will be 
the determining quantity. 
There may probably be 
much to learn about the 
treatment of the land, but 
the soil, from a fertility 
consideration, is good; the 
water supply is unexcelled, 
and the climate is ideal. 
Bitter critics of the under- 
taking, however, are not 
lacking. Their name is 
legion. Condemnation is 
based upon the non-success 
of some of the original 
settlers. Without entering 
into the merits or demerits 
of the agitation which re- 
sulted in an enormous sum 
being paid as compensation, 
the fact remains that con- 
tiguous and similar land 
which disappointed men 
have abandoned is now be- 
ing profitably cultivated. 
The purpose of this article 
is to outline the nature of 
the project, and not to dis- 
cuss in detail difficulties 
which are inseparable from 
any big land settlement pro- 
position, whether irrigation 
or dry-farming. 
From an _ engineering 
point of view, Yanco is the 
fourth largest undertaking 
in the world. A number of 
familiar comparisons are 
often made illustrating the 
enormous storage capacity 
of the dam. When finally 
completed its water content 
will be larger than that of 
Sydney Harbour. The main 
retaining wall will have a 
maximum height of 240 
feet, with a base 160 feet 
thick, tapering to 18 feet at 
