117 



In the first period the maximum fall occurs with south- 

 west, and in the second period with south winds ; and the 

 greatest differences between the two periods are with winds 

 from south-east, south, south-west, and west, the differences 

 with south-east and south winds being negative, and those 

 with south-west and west winds positive. Comparing then 

 the sums of the amounts which fell under the first two 

 winds with those which fell under the last two, we have 

 the following results : — 



It will be observed that in every year of the first period 

 (1858-62) the differences were negative, while in every year 

 of the second period (1863-68) they were positive; or, that 

 the amounts of rainfall under south-west and west winds 

 were invariably greater than those under south-east and 

 south winds during the years when the number of solar 

 spots was above the average, and invariably less in the 

 years when the number of sun spots was below the average ; 

 and further, that the greatest difference in the first series of 

 years occun-ed in 1860, at the time of a solar spot maxi- 

 mum, and that in the second series in 1866, at or very near 

 the time of a solar spot minimum. 



Considering the irregular character of rainfall, both in the 

 times of its occurrence and the amounts in which it falls, I 

 confess I Avas scarcely prepared to expect that the results of 



