is biseimisbaiiamkcapea ni iaioes iscsi clit 
ther has delayed the w 
ny : 
129 
Some facts bearing upon Irrigation. 
By H. C. Russert, B.A., F.R.A.S., Government Astronomer. 
[Read before the Royal Society of N.S.W., 5 September, 1883.] 
So much has recently been said about the irrigation of the interior 
of this Colony that I am induced to publish now some first 
results of experiments I have in progress, for the purpose of 
ascertaining how much water is lost by evaporation from grassed 
land, and also from cultivated land. 
Topped into a hole in the grass-plot that exactly fitted it, but 
Was only 7 inches deep. The ss and soil in the dishes are 
refore level with that outside, and the edges of the dishes stand 
4p 1 inch, to prevent surface water from running in when it 
€ weight is considerable—from 200 to 270 Ibs., aceord- 
pitor and the lifti ear. It only takes a few minutes to weigh 
é y minut 
both accurately to L-l0th of a pound, and 1 Ib. is equal to 0-048. 
hole surface. 
T have but recent] these experi and the wet 
periments, 
aa but, so far as I have gone, the 
