Evaporation Besults in New South Wales and South Africa. 15 



During the above period there was no expenditure of water, the 

 discharge valve only being lifted now and then to see that it was in 

 working order. Cattle drank freely at the dam, but there were but 

 few on the estate. 



II. 



1887. 



Intervals 

 in days. 



Total fall 



during 

 interval. 



Rate per day 

 inches. 



Rate per 



month of 



30 days. 



Jan. 1-Feb. 20 

 Mar. 5-Mar. 25 

 Mar. 26-April 1 

 April 2-May 1 

 May 3-May 17 > 

 May 20-June 25 

 June 25-July 2 

 July 2-July 25 

 July 25-Sept. 10 

 Sept. 10-Nov. 19 J 

 Nov. 20-Dec. 31 



CD 

 +=. CI . 



is-- 1 a 



O CD O 



2 S 5 



W Qj 



50 

 19 



6 

 28 

 14 

 36 



7 



23 



. 47 



70 



41 



25-20 

 5-28 

 1-20 

 4-66 

 1-68 

 6-12 

 0.60 

 2-28 

 8-04 

 24-24 

 13-08 



0-504 

 0-278 

 0-200 

 0-163 

 0-120 

 0-170 

 0-086 

 0-099 

 0-171 

 0-346 

 0-319 



15-12 

 8-34 

 6-00 

 4-89 

 3-60 

 5-10 

 2-58) 

 2-97) 

 5-13 



10-38 

 9-57 



The above table is framed from a report sent to the Government, 

 February 29, 1888, in which simple measurements are recorded. 

 Corrections are needed for the periods during which water was 

 actually running into the dam ; thus from February 20th to March 5th 

 no fall whatever is shown. The total value of this correction does 

 not exceed + 6 inches. On the other hand rather more than a foot 

 must be subtracted from the total for water used in irrigation. The 

 loss from evaporation and percolation is then 7*30 feet, or about one 

 foot less than in 1884. 



III. 



AUSTRALIAN 



Station. 



Lake George average 



,, tank 



Dubbo , , 



Hay 



Sydney 

 Walgett , , 





Time. 



rage ..'. 



8 years' evap. only . . . 





4 





6 





8 





'8 





8 



Rate. 



40 inches 



28 



60i 



40 



36 



55 



