130 SOME FACTS BEARING UPON IRRIGATION. 
evaporation from the grass appears to be about 1} times, and from 
soil has been as much as 34 times that from water. This is what 
might have been anticipated, for the grass greatly increases the 
this is fairly lit g eee 
estim ted y t gi bové, Itmust however, be borne 
in mind that when irrigation would be most wanted the heat and 
dryness of the atmosphere would be greater than under the com 
ditions of a good season, and the evaporation would be also greatels 
and there can be little doubt that provision must be made for ® 
very free use of water at such times, 
When I next take up the subject I hope to have a more extended 
Series of observations on which to base conclusions, but I think 1 
a that a very large supply of water would be required ; a 
at the estimate is a fair one is I think evident from the following 
opinion from perhaps the most competent man in England. 
rs 
: 
s 
Es 
— west 
