162 THE RAINFALL OF GUERNSEY. 



by one of the States Engineers I have been able to make an 

 approximate estimate of this loss, which will be found in detail 

 in the table, but I may point out that the total loss from these 

 two causes is not less than 66 per cent, of the total rainfall. 

 After making these allowances, we find that the effective rain- 

 fall amounts to 18 inches, of which about 16 inches belong to 

 the months I have looked upon as " effective." 



These figures reduced to gallons give as the annual rain- 

 fall 12,544 millions of gallons, subject to a loss of 7,150 millions, 

 giving an effective rainfall of 5,394 millions of gallons. 



The last two winters, that is those ending March, 1901 

 and 1902, gave 15*43 and 13*83 inches instead of nearly 23 

 inches each year — say 15^ inches shortage for the two winters. 

 This represents 5,200 millions of gallons. If we take the 

 shortage of the last 20 years it works out at 7,000 millions of 

 gallons, out of which the last two years have contributed 

 5,200 millions. It is therefore evident that the wells which, 

 however deep they may be, are still surface wells, must feel 

 the effects of the shortage. 



WET DAYS. 



Hauteville 199 



Les Blanches 196 



L'Ancresse 185 



Grange 191 



Claire Mare 171 



DROUGHT. 



Claire Mare 14 days Jan. 9th-24th. 



FALLS OF ONE INCH AND OVER. 



Hauteville Aug. 18th 1*03 inch. 



Claire Mare April 26th 1.11 „ 



Les Blanches July 19th 1*02 „ 



