to the Town of Geelong. 



51 



myself, felt an interest in daily recording its readings, and 

 which his constant residence there, and regular habits, 

 enabled him to do. 



Considering that the members of the Institute would feel 

 but little interest in the returns of but a few months, since 

 the guage was fixed at Wormbete, I have not included it in 

 the above table ; but it may be satisfactory to know that up 

 to the latest date it records a rain-fall exceeding Geelong by 

 forty-Jive per cent., quite equalling Melbourne ; and exceeds 

 Yan Yean by thirty per cent.* 



Taking the records of Melbourne, as before stated, on Mr. 

 Archer's authority, as showing a rain- fall of 32*63, and that 

 of the Yan Yean (twenty miles noi'th of Melbourne) on the 

 authority of Charles James Griffith. Esq., M.L.A., the 

 President of the Sewerage and Water Commission, who 

 states it as being as high as 36 inches per annum, and 

 which I believe, from my own experience, to be very con- 

 siderably under the mark. 



These, with simultaneous observations upon the quantity 

 discharged by the outlets of this (Yan Yean) now ascertained 

 area of surface drainage, and a comparison of the quantity of 

 rainfall, will afford something like data of the greatest import- 

 ance. This, together with a careful study of the configuration 

 of the surface of that district, with its attendant or exciting 

 causes, enable me to approximate pretty near the truth of 

 what proportion of rain can be considered available ; no 

 doubt, however, this must be modified by the local circum- 



* Subsequently I have been enabled to fill up a Six Months' comparative 

 Table, as annexed, of the before mentioned localities, quite verifying my 

 anticipations : — 



Comparative Bain-fall at Wormbete, Geelong, Melbourne, and Yan Yean. 



MONTHS. 

 1857. 



Wormbete. 



J. E, Hop- 

 kins, Esq., 

 Observer. 



Geelong. 



A. J. Skene, 



Esq., 



Observer. 



Melbourne. 



E. B. Smyth, 



Esq., 

 Observer. 



Yan Yean. 



Chas. Taylor, 



Esq., 



Observer. 



MONTHS. 

 1857. 



January .... 

 February . . . 



May 



0-82 

 2-35 

 2-84 

 1-70 

 2-77 

 3-24 



0-70 

 3-39 

 1-09 

 1-07 

 1-72 

 1-58 



1-23 

 3-98 

 3-80 

 0-99 

 2-00 

 1-99 



0-97 

 1-33 

 3-61 

 0-78 

 2-05 

 1-80 



January. 



February. 



March. 



April. 



May. 



June. 





13-72 



9-45 



13-99 



10-63 





E 2 



