354 



A STUDY OF COKKELATIONS AM()X(i TERKESTKIAL TKMl'ERATURES. 



Table IX. — Conduded. 

 Dove's Smiultaneous Monthly Departures of Temperature from the Normal. 



The sums of the squares of the deviations Avhich enter into the theory are formed 

 for each year, and shown in the following table. S^r is, in each case, formed from the 

 deviations in the preceding table. S^t" is the sum from the last column of that table, 

 which is multiplied, for each year, by n, the number of stations used. As shown in 

 the general theory, the difference, li^tr- — tiV', so far as it is not the result of acci- 

 dental errors and deviations, measures the correlation among the stations. 



Results of Dove's Mean Monthly Deviations. 



Year 



1845 

 46 



47 

 48 

 49 



1850 

 51 

 52 

 53 

 54 



1855 



East South 

 Asia Europe 



10.3 

 7.7 



10.1 

 6.8 

 9.7 



9.0 



6.4 

 10.8 



8.4 

 12.9 



8.7 



15.7 

 15.6 

 10.3 



18.4 

 8.7 



13.8 

 15.8 

 20.2 

 14.0 

 11.2 



15.7 



Normal equation 



360 r<,2 = +30 

 240 — 8 



240 



180 —17 



144 — 3 



144 

 144 

 240 

 240 

 240 



240 



—10 

 + 17 

 — 1 



+ 15 

 + 3 



+10 



2412 r<,2 = +36 



By reduction to the centigrade scale the final equation becomes 



24127 



56 



