152 



EEV. C. ^y. HAETEY — EAEN^FALL IN HERTFORDSHIRE. 



varying from 13 to 16 ; nor is there much difference in the number 

 of wet clays per quarter. November, with 1 6 out of its 30 days 

 wet, showing an average fall of 0-17 in. each wet day, appears to 

 be on the whole the wettest month ; whilst March, with its 13 wet 

 days and mean of O'lO in. per wet day, seems to be the driest 

 month. 



Table IX. — I have in this table attempted as far as I could to 

 compare the mean rainfall of each district with the mean fall of 

 the county. Moving across England in a north-easterly direction, 

 you will find that the rainfall decreases as you proceed ; and even 

 within the limits of our own county this is clearly perceptible. 

 Compare the mean rainfall of the Gade district in the S.W. with 

 the mean rainfall of the Ehee district in the N.E., and you will 

 find that while the former is 6 7o and 7 7o above, the latter is 10 7o 

 and even 16°/^ belotv the mean of the county. 



Tables X, XI, XII. — These tables need no particular comment, 

 only showing extremes of rainfall. 



To conclude, I trust that these tables, which I have endeavoured 

 to make as accurate as possible, may prove both of interest and of 

 use to the numerous observers of rainfall ; and I would fain hope 

 that since I have followed out Mr. Pry or' s system of river districts, 

 comparing the rainfall of one district with that of another, they 

 may not prove altogether uninteresting to our botanical members 

 and friends. 



Table I. — Showing River Districts and Distribution of Rainfall 



Stations.^ 



No. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



RIVER DISTRICTS. 



m 

 S 



K 

 H 



Colne 



Thame Upper Thame. 



Lower Colne . 

 Upper Colne . 



Ver 



Gade 



(_ Chess 



Brent Upper Brent . 



' Lower Lea .... 



<; 



Lea 



o 



Ivel . 



Cam. 



Upper Lea 

 Miraram . . . . 



Beane 



Rib 



Ash 



Stort 



Hiz 



Upper Ivel , 

 Ehee 



* The arrangement adopted is the same as in the map forming Plate III. of 

 the present volume. 



