Notes on Hydrology. 



95 



The following is a list of the mean number of wet days 

 per month in Sandhurst for 20 years ending 1881 ; the 

 mean monthly rainfall ; mean intensity per wet day ; the 

 maximum and the minimum : — 



Mean wet Mean rain. Intensity per Maximum Minimum 



Month. 



days. 



Inches. 



wet day. 



per month. 



per month. 









Inches. 



Inches . 



Inches. 



January ... 



4-25 



.. 144 ... 



•33 



.. 375 



.. -o 



February 



3-95 



.. 1-46 ... 



•34 



.. 6-36 



... -oi 



March 



510 



.. 1'46 ... 



•31 



., 610 



.. -06 



April 



815 



.. 1-79 ... 



•22 



... 5-21 



.. -35 



May 



1025 



.. 202 ... 



•20 



.. 3-84 



.. -37 



June 



11-40 



.. 2-54 ... 



•22 



.. 6-24 



.. '2Q 



July 



11-50 



.. 1-89 ... 



15 



.. 4-29 



.. 14 



August . . . 



1285 



.. 215 ... 



•16 



.. 5-23 



.. -26 



September 



10-65 



.. 2-24 ... 



•21 



.. 5-85 



.. -27 



October . . . 



930 



.. 2-34 ... 



•24 



.. 7-63 



.. -17 



November 



6-40 



.. 1*48 ... 



•23 



.. 6.47 



.. -oo 



December 



5-25 



.. -94 ... 



•18 



.. 4-90 



.. -oi 



Mr. Ellery has kindly supplied me with the following list 



of rainfalls at Melbourne ; — 





Rate per hour. 



1859— June 14 ... 



•57 inches 



in 1 ho 



iir ... • 



57 inches 



I860— Sept. 



8 ... 



•50 „ 



1 „ 





50 „ 



Dec. 



9 ... 



310 



12 M 



. . . 



— 



1861— Jan. 



31 ... 



2-37 



11 „ 





— 



Mar. 



19 ... 



1-00 



3 „ 



... 



— 



1862— Dec. 



8 ... 



•48 



25 mil 



lutes ... 115 inches 



1863— Oct. 



12 ... 



•85 



12 hoi 



irs 



— 



Nov. 



22 ... 



•96 



8 „ 





— 



1864— Mar. 



2 ... 



1-18 



30 mil 



mtes . . . 2*36 inches 



Apri] 



12 ... 



110 



12 hoi 



irs 



— 



1867— April 



6 ... 



•86 



12 „ 





— 



1870— Jan. 



3 ... 



1-08 



4 „ 



... 



— 



Jan. 



25 ... 



1-52 



12 „ 



• . . 



— 



1871— Feb. 



7 ... 



1-89 



9 „ 



■ • • 



— 



Aug. 



8 ... 



1-30 



9 „ 



. . . 



— 



-Nov. 



22 ... 



•62 



15 mir 



mtes ... 2.48 inches 



1872— Nov. 



19 ... 



''43 



20 „ 



... 1-29 „ 



1877— Mar. 



10 ... 



TOO 



15 , 



... 4 00 „ 



April 21 ... 



1-76 



7 hoi 



irs 



— 



1878— Mar. 



15 ... 



212 



12 „ 



... 



— 



1882— Dec. 



5 ... 



1-25 



1 „ 



... 1*25 inches 



I fear that by this time I must be wearying you with 

 statistics, and as I am not a professional lecturer, and 



