THE CORRELATIONS OF AREAS OF MATURED CROP AND THE RAINFALL. 



393 



Afzril May June July Augu& Se/ifmi Oet r 



Fig. 17. 



The fitting of a ' normal ' (Gaussian) curve to the rainfall data 

 of Zafarwal, District Sialkot, for the 20 years 1887 — 1906. 



Ver. Scale 1 cm. = 3". 



Hor. Scale 2 cms. = 3 months. 

 Equation of curve — 



where x and y are both measured in Jrd cm. units. 



The maximum (modal) rate of rainfall occurs at about July 

 30th. 



April May June July August Sspt r Oct r 



Fig. 18. 



The Rainfall data of Zafarwal 

 fitted with a skew curve — 



y=uo 8 



v 37-42/ 



4*006 H0705a: 



e 



where x and y are both measured 

 in Jrd mms. 



Ver. Scale 1 mm. = T V" h.m. 



Hor. Scale 1 mm. = ^th month . 



Distance between mean and 

 mode = 3-11 mms. 



From mid point of July to end 

 of range = 18-58 mms. = 2787 

 mos. 



.Vov One Jar. j Feb" Mtrrh AflHl 



Fig. 19 



Fitting of the Rainfall data of Zafarwal 

 I Nov. to April) with askew curve — 



y=9* I 4i i + 



V 14-08 / 



4279 - 3'04k. 



e 



where x and y are both measured in i cm. 



Hor. Scale 1 cm. = 45-3 days. 

 Ver. Scale 1 cm.= T |/ / per diem. 



-^ 



May June Julr August Se/it" OH' Nov' Dee' Jan" Feb" Marcn Afint 



Fig. 20. 



The two curves (Summer and Winter rains) on the 

 same scale. 

 Equations of curves — 



1006 + r0705a; 



e 



«y=ii-o(i-~y 



(ii) v = 274 2(l + -^- 8 ) 



where x and y are measured in £ cms 



42 79 - .'V04:r. 



e 



