RAINFALL AT OLD TRAFFORD. 



57 



In the first place I annex a comparative statement of 

 the various periods. 



Month. 



January... 

 February 

 March ... 



April 



May 



June 



July 



September 

 August * 

 October . . . 

 November 

 December 



Sums 



1850-1860. 



1861-1870. 



1850-1870. 



1794-1870. 



in. 



in. 



in. 



in. 



2778 



2-659 



2-719 



2-505 



1-899 



2*412 



2-156 



2*397 



1-925 



2-356 



2*131 



2*297 



1-848 



1-983 



1-915 



2-031 



1-808 



2-II2 



**953 



2316 



3'3*° 



2-286 



2798 



2-683 



2*869 



2'547 



2713 



3*5i5 



4-806 



2-913 



3*454 



3*534 



2-745 



4-014 



3*349 



3-263 



3-280 



4-191 



3*7^5 



3-877 



2'6ll 



3*245 



2*928 



3*8i4 



2-786 



3'347 



3*°53 



3*3°7 



32-665 



34*165 



3 2 '954 



35*539 



This Table evidently points ont the fact that the period 

 1850 to i860 was drier than the period i860 to 1870, and 

 would have shown it much more so if the observations for 

 August had been complete during the earlier period, as 

 the average of the 4 years 1857, ^S^) J ^59^ anc -- i860 is 

 quite an abnormal value, the rainfall in this month being 

 excessive in each of these years. 



During the last ten years, the smallest amount of rain 

 occurred in 1865, the amount being 29*389 inches, falling 

 upon 164 days ; the largest amount occurred the following 

 year, 1866, the amount being 43*169 inches, falling upon 

 214 days. 



From the longer period of observations, 1794 to 1870, 

 it seems to be quite well established that in this district 

 the minimum rainfall occurs in April, and the maximum 

 in October; and, but for the departure from symmetry 

 in September, we should have a simple curve, with one 

 maximum and one minimum. 



In October 1870, the largest fall of rain for the month 

 occurred of any October between 1 794 and 1870, and during 



* 1850 to i860, four years only. 



