BAnfFALL IX HERTFORDSniKE IN 1891. 



59 



Diufn'hufi'on of RaiufaU throufihout the County. — The mean rain- 

 fall in the catchmeut-basin of the Ouse was 27"61 ins., and in that 

 of the Thames 29-87 ins. The following table (Table IV) gives 

 the mean fall for each month and for the year in each of the five 

 river-districts represented, and in tlie county for comparison, and 

 also the difference in the year from the mean for the decade 1880-89. 



Table IV. — Eainfall in the River Disteicts. 



Months. 



January .... 

 February .... 



March ..! 



April 



May 



June 



July 



August 



September 

 October .... 

 November 

 December 



Cam. 



ius. 

 i"57 



•02 

 1-63 



■57 

 301 



2"I7 



2-32 

 3-54 



I '20 

 5-05 



311 



Year 25-94 



Diif. from 1880-89; -I-3-43 



Thame. 



ins. 

 2*25 



•00 

 1-62 

 1-23 

 2-87 



I "21 



1-95 



5-03 

 I '23 

 8-41 



2-59 

 4-65 



COLNE. 



3304 



ms. 



2 "22 



•03 



I '53 

 1-26 



323 

 I 40 

 2-65 



4*23 

 1-28 



7-34 

 2-41 

 4-29 



•87 



[ + 



2-61*]' 



-1-3-06 



Lea. 



ms. 



2-02 



■05 

 I 82 



•97 

 3-36 

 I -41 

 2-31 



373 

 1-25 

 5-28 

 2-20 

 3-63 



28-03 



+2-37 



County. 



ins. 



2 -06 



•04 

 1-67 

 1-07 

 3-28 



I 45 



2-45 

 3 '94 

 1-23 

 6-24 



2-28 



3"9i 



29-62 



-f2-88 



The mean rainfall in each of the minor river-basins or sub- 

 districts, was as follows : — 



ins. 

 Upper Thame.. 33-0-1 



Mimram 28-69 



Beane 27-81 



Rib 28-16 



Ash 29-20 



Upper Lea 27-38 



Lower Lea 28-06 



The total yearly fall ranged from 25-94 ins. at Royston to 

 35-70 ins. at Moor Park, Rickmansworth ; and the total monthly 

 fall from no rain at six stations in February to 8-41 ins. at 

 Tring Vicarage in October. The greatest fall in any one day was 

 1-88 in. at Cheshunt College on the 24th of May. 



Distribution of Rainfall in each Month. — The nomenclature used 

 in the following account of the chief falls of rain is the same as in 

 my previous reports, falls of at least \ inch being styled considerahle, 

 f inch very considerable, 1 inch great .^ \\ incli very great, \\ inch 

 heavy, If inch very heavy, and of 2 inches and upwards excessive. 

 This analysis only applies to the 25 stations from which I have 

 returns of the daily rainfall. 



* Rainfall for three years of this period computed. 



