76 



KEPORTS ON THE STATE OF SCIEKCE. 



From the above three tables, if we omit Batavia, it being near the 

 Equator, we obtain the following results : — 



In District No. 1 the live stations in the Southern Hemisphere have 

 an average distance from an origin of 98°, and the average number 

 of records has been 23 per cent. The remaining nine stations in the 

 Northern Hemisphere had an average distance of 51°, while the average 

 percentage of their records is 59. 



For District No. 2 the average distsjice from an origin for five 

 southern stations was 94°, and the average psrcentage of records was 33. 

 The corresponding figures for the eleven northern stations are 58° and 

 68 per cent. 



For District No. 3 the figures for the five southern stations are 100° 

 and 30 per cent. The corresponding figures for the eight northern stations 

 are 71° and 70 percent. 



The averages for the three districts taken together are for the 

 southern stations 97° distance and 39 per cent, of records, while for the 

 Northern Hemisphere we get 60° and 66 per cent. 



When looking at the above three tables it must be remembered that 

 amplitude of motion decreases rapidly with distance from an origin, and 

 therefore too much stress should not be put upon the fact that stations in 

 the Southern Hemispliere were at greater distances from origins than those 

 in the Northern Hemisphere. On p. 77 we compare stations in the two 

 hemispheres which are at equal distances from origins. 



Comparison of Records obtained from Stations lyir.r; to the D'fst of Oiiyirs ivilh 

 those ichich lie to the East. The S/ationx comjjared are approxitnatcly at Ike 

 same Distance from the Oritjins considered. 



Stations to 



Station 



San Fernando 



Toronto 



Victoria 



Average . 



District No. 1. 



West. 

 Dis- 

 tance 



o 



38 

 80 

 80 



69 



Percentage 

 of Records 



80 

 40 

 40 



63 



Station 



India 



Batavia 



Honolulu 



Average 



Stations to East. 

 Dis- 

 tance 



o 



. :5S 



. 74 

 . 115 



Percentage 

 of Records 



60 

 20 



28 



36 



Beirut . 

 Cairo . 



Average 



36 

 40 



38 



District No. 2. 



69 



50 



59 



Mauritius 

 Japan . 



Average 



38 

 50 



44 



61 

 45 



63 



Beirut . 



San Fernando 



fcan Fernando 



Average . 



78 

 100 

 100 



93 



District No. 3. 



64 



71 

 71 



69 



Victoria 

 Toronto 



Victoria 



Average 



78 



51 



The ger.eral average for the three districts combined is for the 

 westeria stations a distance of 66° and 60 per cent, of records; whilst 

 for the eastern stations the distance is also 66°, but the number of 

 records fall to 4C per cent. 



