472 



Rainfall in England. 



[Oct., 



given, obviously belong to the first group, those from Oxford to the 

 second, and those from Preston to the fourth : — 



Vertical gauge-distances. 



Number of 



Average Foot-defect, 



in feet. 



Annual Returns. 



per cent. 



From 10 to 20 . . 



22 



•939 



„ 20 to 30 .. .. 



53 



•512 



„ 30 to 40 .. .. 



50 



•395 



„ 40 to 50 .. .. 



35 



•378 



„ 50 to 60 . . 



19 



•305 



„ 60 to 70 . . 



13 



•374 



From the foregoing figures, it appears that if the contents of 

 the lower gauge be divided into 100,000 equal parts, the upper 

 gauge will, on the average, receive 939 fewer such parts for every 

 foot of elevation, provided such elevation be not less than 10 nor 

 more than 20 feet; or 512 fewer such parts per foot provided the 

 vertical gauge-distance be not less than 10 nor more than 30 feet, 

 and so on. 



A glance at the last or right-hand column shows: 1st, that, with 

 one exception, the foot-defect diminishes with increased vertical 

 gauge-distance; 2nd, that the difference between two consecutive 

 foot-defects becomes less and less with increase of difference of 

 elevation, and almost disappears at the height of 70 feet. 



At certain stations, as Cardington and Cockermouth, there are 

 three gauges, each at a different height above the ground, whose 

 receipts are tabulated below : — 



Stations. 



Cardington 



Cockermouth 



Height 



of 



Gauges. '• 



ft. 



in. 











3 



6 



36 











6 



6 



6 



100 







Actual Rainfall in inches. 



1867. 



27-25 26-88 23'57 

 26-18 25-53! 22'26 

 22-23 , 21-37 17*26 



1868, 



1869. 



Mean I ^ I( T 



Relative Joot- 



!Rainfall.'- defect - 

 Means, i iper cent. 



21-94 21-25 | 24-18 

 21-30 20-33 23-12 

 16-94 17-44 19-05 



50-77 38-35! 50-12 46-31 

 48-19! 36-29 48-02' 44-48 

 31-30 20-07 ! 27-10 22-86 



46-39 

 44-24 

 25-33 



100 

 96 

 79 



100 

 95 

 55 



1-14 

 •58 



■83 



•45 



Here, as before, the receipts of the gauges, at the same stations, 

 were greater when nearest the ground. 



The difference of receipts increased with increased difference of 

 elevation. 



The deficit, per cent, per foot, became less as the difference of 

 height became greater. 



And on comparing the results from the two stations, it appears 



