484 Dr. G. Chree : Results obtained at Kew Observatory with 

 Table VI.— Much Cloud ~ Little Cloud. 





Cloud 

 Difference. 



Differences as percentages of seasonal mean. 



+21 

 +32 

 + 18 

 + 14 



a-. 



q. q\ 



\ 



p. 



1 



Year | 53 



Winter 6*2 



Equmox 5*0 



1 



Summer \ 4*7 



+21 



+33 



+ 17 



+ 18 



-5 +1 

 -8 



- 6 -; 



-1 +3 



-14 

 -19 



- 7 

 -13 



To elucidate Tables III. to VI., take Table IV. as an 

 example, and consider the case o£ the u year/'' The means 

 of the 12 monthly means derived from the groups of warmest 

 and of coldest davs were as follows : 





Temp. 



«+. 



a~. 



2- 



q!> 



P. 



From groups of warmest days ... 

 From groups of coldest days ... 



e 



59-4 

 51-3 



■577 

 •513 



•876 

 •726 



1-70 



1-58 



1-52 

 1-41 



229 



267 



- 38 

 250 



Excess on warmest clays 



+84 

 ... 



+•064 

 •541 



+ ■150 

 •799 



+ 012 

 1-63 



4-011 



1-47 



Corresponding mean values 



Excess as percentage of mean ... 



... 



+ 12 



+ 19 



+ 7 



+8 



-15 



§ 8. Before discussing Tables III. to VI. it is convenient 

 to introduce two other Tables which present another aspect 

 of the oase. The comparison of groups of days, as already 

 explained, was made for each of the 36 months of the three 

 years. If a close connexion exists between a + or a_ and 

 any of the other elements considered, then there ought to be 

 a substantial majority of individual months in which the 

 connexion appears. This is the aspect of the case that is 

 dealt with in Table VII. 



A value near 18 indicates little or no connexion. A value 

 much above 18 indicates a marked tendency for the two 

 quantities compared to be large together, while a value much 

 under 18 signifies that the one quantity tends to be large 



