WATER SUPPLY AND IRRIGATION, 173 
that the Colony generally shall reap the full advantage of the 
increased value of these lands—an increased value that should be 
credited to these works, and which, while recouping the country 
for a considerable proportion of the outlay, would at the same 
time practically prohibit these areas being devoted purely to 
grazing. The increased cost of such land would also have the 
effect of making the holder more rapidly develop its capabilities 
nche 
local sources, and with that derived from our great rivers ; not 
forgetting that many cases may arise where the supply obtained 
from the former could be largely aided by the latter, and vice 
Sl. 
The country to be dealt with consists in the west and south- 
west of extensive plains, broken here and there by sand-hills and 
low ranges, and with a small fall in the direction of drainage, but. 
. per courses, but this gradually diminishes as they run 
Westerly, till in the plain country it does not much exceed 4 
$ in the mile, but ends give a river length roughly 
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qe. Inds are very dry and act very continuously. Th ' ; : 
TS eause must attain its maximum when the annual fall 
