CLXXXIV.. GAUGING OF FLOW OF STREAMS AND ARTESIAN BORES. 
selected by the author, the area of the middle cross section 
on Aug. 29th, 1901 was 2,328 sq. ft. and the mean of the 
cross sections was 2,320 sq. ft. Again on Aug. 26th 1901, 
area of middle cross section 1,086 sq. ft., mean of the three 
cross sectional areas 1,100 sq. ft. When the site has been 
fixed upon, a base line is laid down on the left bank from 
90 to 200 feet long, according to circumstances and parallel 
to the flow, a peg is driven in at each end of this base line 
and one in the centre. Cross sections of the river perpen- 
dicular to this base are takea from each peg, supposing of 
course that a site has been selected as mentioned above at 
Cowra, if not more cross sections should be taken and the 
mean taken. The cross sections are taken with level and 
staff from peg to water’s edge, thence by sounding to 
water’s edge on right bank, then again by level and staff 
to the top of the right bank. 
A bench mark is established at the gauging site con- 
nected by levels to the gauge and toa Water Conservation 
bench mark, so that the RL of the water surface can be 
taken at each observation. Wires tagged at each ten feet 
are then stretched across the river at each cross section. 
These wires should be as near the water surface as is con- 
venient; asa rule the author places them about 3 feet 
above to allow a boat to pass beneath, so that the floats 
may be followed and picked up after travelling the required 
distance. 
The rods used by the author consist of 1 inch pine rods, 
with sheet lead wrapped round them to sink them to the 
required depth, and a stock of various lengths is kept in 
the boat. The rods are sunk so that only about $ inch pro- 
jects above the water surface, to minimise the effect of 
any wind that may be blowing. The tops of the rods are 
painted a bright red, so that they can easily be distinguished ~ 
from the bank. A rod of the required length is let go from 
