346 



A STl'DV (IK COKRKLATIONS AMON<l TERKKSTKIAL TK.Ml'KRATURES. 



States, Havana and Kingston with the distant ones, shown in the following table with 

 the result : 



Correlation Between North American and Distant Regions, Taken Two by Two. 



The correlation between Argentina and distant regions is as follows 



We have finally the correlation between Apia and the I ndo- Australian regions. 



o 



inc' r = 1.56 



" 156 



33 



108 



453 



The curious synchronism between the annual departures of Kingston and all the 

 most distant stations, especially Argentina, may well excite notice. But I do not con- 

 ceive that we can attribute it to anything but chance coincidence. 



We next take the pairs between which we should expect correlation on account 

 of their proximity. A detailed exhibit of the results does not seem necessary. The 

 summation of ww'vv' gives : 



o 



United States : Havana-Kingston 3 pairs A= + 15.7 

 Indo-Australian series 6 pairs A = + 20.3 



The complete summation of the values of A gives 62°. 3, in fair agreement with 

 that derived from the combination of the squares of the deviations. 



It seems therefore that, of the 36 pairs of regions, 9 which were in proximity 



