100 



JO*. W. R. BALDWIN- WISEMAN ON 



[Feb. 1907, 



Table XIII, showing the Annual Extreme Variation of Level in 

 the Well at Shepherds Shore, Devizes. 



Year. 



Bates of extreme levels. 



Variation 

 of level, 

 in feet. 



Highest. 



Lowest. 



1894 



March 26th. 

 January 28th. 

 13th. 

 March 29th. 

 February 7th. 



23rd. 



March 8th. 



April 27th. 



May 5th. 



„ 17th. 



October 30th. 

 November 5th. 

 September 24th. 

 December 14th. 

 November 26th. 

 December 6th. 



4th. 



2nd. 

 November 26th. 

 January 1st. 



45-0 

 58-3 

 393 

 54-3 

 31-5 

 64-7 

 62-8 

 426 

 30-5 

 530 



1895 



1896 



1897 



1898 



1899 



1900 



1901 



1902 



1903 





TA0LE XIV, SHOWING THE MEAN RAINFALL, RUN-OFF, EVAPORATION, AND 



Percolation in the Thames Basin, in Inches of Rain distributed over 

 the Whole Area. 



In Three-Monthly Periods. 



Period. 



Rainfall. 



Bun-off. 



Evaporation. 



Percolation. 



inches. 



inches. 



As a per- 

 centage 

 of the 

 rainfall. 



inches. 



As a per- 

 centage 

 of the 



rainfall. 



inches. 



As a per- 

 centage 

 of the 

 rainfall. 



Oct. to Dec. ... 

 Jan. to March . 

 April to June... 

 July to Sept — 



8-01 

 6-07 

 5-28 

 676 



2-16 

 321 

 1-55 



0-82 



27-0 

 52-9 

 29-3 

 12-1 



0-85 

 099 

 6-70 

 6-48 



10-6 



16-3 



126-9 



95-9 



+ 5-00 

 + 1-87 

 -297 

 -0-54 



+62-4 

 4-30-8 

 -562 

 - 80 



In Six-Monthlt Periods. 



Oct. to March - 

 April to Sept. . 



14-08 

 1204 



5-37 

 2-37 



38-1 

 197 



1-84 

 1318 



m 



109-5 



■ +6-87 

 -3-51 



+48-8 

 -29-2 



- sig" 



ifies that 



the percolated water is drawn upon t 

 evaporation and run-off. 



In Yearly Periods. 



maintair 



1 



Oct. to Sept. ... 



26-12 



7-74 



29-6 



1502 



57-5 



+3-36 



4-129 



The rainfall recorded above is the average rainfall over the whole 

 Thames Basin during a period of 20 years, from 1883 to 1902. 

 The run-off is the average discharge over Teddington Weir for 



