WATER SUPPLY IN THE INTERIOR OF NEW SOUTH WALES. 107 
extent of country, when it would really pay to concentrate it. The 
capital sufficient to make the necessary water so as to give the 
heep on our inland pastures a fair chance would no doubt be very 
large, but still I think, after looking into it carefully, it would pay 
i iture. The bes 
close to the main tank, and connected with it by means of a pipe, 
which can be closed when the main tank is full to surface level, 
and the water must then be pumped from the tank over the 
embankment, to be stored above the surface in the main tank, run 
out again from above the surface by means of a syphon and pumped 
from below for the use of stock. A puddle-gutter, which is simply 
a trench 6 or 8 feet wide and carried down to the firm imper- 
any given area of country than is generally supposed, and of course 
the mistake above mentioned would be avoided. The curvature 
of the earth being about 8 inches to the mile, and the slope of the 
country in many places out west about the same, it is of course 
necessary to take this into consideration in looking for a sufficient 
slope to cause water to run. e cost of excavation is, on an 
i h nk 
described, with an excavation in the main tank of 10,000 yards 
and in the silt tank of 1,000 yards, would cost, when finished, 
L 
