RAINFALL OF GUERNSEY. 



91 



with a view of finding out the movements of the mean rainfall, 

 and I consider the results of sufficient interest to bring before 

 you. In 1882 the mean rainfall of the then 40 years' record 

 was exactly 37 inches ; up to that date it had remained 

 persistently below 37 inches, influenced by some very dry 

 years at the commencement of the period under observation 

 and during the first 15 years. The first 15 years gave a 

 mean rainfall of only 34*72 inches. A period of high rainfall 

 then set in lasting 10 years and raising the mean to 36*00 

 inches from which it rose fairly steadily to the 37*00 inches 

 at the end of 40 years. For exactly ten years longer the 

 mean remained over 37 inches, but then it began to fall below, 

 and has remained beloAv ever since, being now 36*59 inches. 



From 1882 to 1892 inclusive, the rainfall was quoted as 

 37 inches average; that is now no longer possible ; 36| inches 

 is the correct mean and is more valuable than the former 

 figure because it is obtained over a longer period. 



This year has proved a dry one, for it is over 2 inches 

 (2*47 inches) below the diminished mean. Table II. gives 

 the detail of the year for " Brooklyn." 



TABLE II. 



RAINFALL AT 'BROOKLYN," ST. MARTIN'S ROAD, 

 FOR 1905, 



Compared with the 63 years' Averages. 





Rainfall. Inches. 



Wet Days. 



Months. 



1905. 



m vppr^' Above or 

 AvSes below the 

 Averages. Average. 



1905. 



Aver'ges. 



January 



February 



164 

 179 

 571 

 2-11 

 0-16 

 3-90 

 054 

 213 

 3-50 

 301 

 7-87 

 176 



3'81 — 2-17 

 2-62 — 083 

 2-52 + 3-19 

 2*34 — 0*23 

 2*12 — 1-96 

 2-04 -•- 1-86 

 2-17 — 1*63 

 2'46 - 0-33 

 3-12 — 0'38 

 4-85 , — 1-84 

 4'42 -1- 3'45 

 412 — 2-36 



12 

 21 

 23 

 19 



4 

 15 



9 

 18 

 20 

 21 

 29 

 13 



19 

 15 



March 



April 



May 



June 



July 



August 



September 



16 

 14 

 11 

 11 

 11 

 13 

 14 



October 



November 



19 

 19 



December 



19 



The year 



3412 



36 59 i — 2-47 



204 



181 



