5g REPORTS ON THE STATE OF SCIENCE.—1913. 
The earthquakes considered are Nos. 977, 1025, 1128, 1190, 1272, 
1301, and 1460. 
Eleven stations North of the Equator recorded 61 disturbances, 
or an average of 5°5 per station. Six stations South of the Equator 
recorded 29 disturbances, or an average of 4'8 per station. If we 
only consider stations more than 60 degrees distant from an origin 
these averages respectively become 5°4 and 5. 
That the average number of northern records preponderates over 
those obtained in the South seems more remarkable when we consider 
the average distances of these two groups of stations from the origin— 
the former being 95 degrees and the latter 75 degrees. 
Six stations lying to the East of long. 150° HE. noted 32 disturb- 
ances, or on the average 5°3 per station. 
Twelve stations lying to the West of this meridian noted 65 dis- 
turbances, or an average of 5°4 per station. 
This last result suggests that the quantity of motion propagated 
eastwards is the same as that which is propagated towards the West. 
With this exception, the four groups of earthquakes considered 
indicate that motion travels to greater distances northwards and west- 
wards than it does southwards and eastwards. i 
If we take the four districts together we find the following :— 
40 northerly stations gave 160 records, or 4°0 per station. 
27 southerly 86 x 3°2 5 
40 westerly a 154 % Ball bs 
31 easterly - 97 x, Bal _ 
District No, 5.—West of South America, or approximately 80° W. 
30° S. 
The earthquakes considered are Nos. 1248, 1248p, 1277, 1398, 1851, 
and 1852. 
Each of these six disturbances was recorded at two or more stations 
in Great Britain, 105 degrees distant from the origin. 
Five were noted at San Fernando, Honolulu, and Cape Town, the 
respective distances of which from the origin are 95, 88, and 78 degrees. 
The average distance is 87 degrees. 
Four were recorded at Toronto, Victoria, Azores, Tokio, Perth, 
and Zikaiwei. The distances of these from the origin are respectively 
73, 88, 85, 145, 115, and 160 degrees. The average distance is 110 
_ degrees. 
Three were noted at New Zealand, Mauritius, Bombay, and 
Calcutta. The distances of these places are respectively 85, 125, 
155, and 170 degrees. The average distance is 134 degrees. 
Two were noted at Colombo, Kodaikanal, and Irkutsk, the distances 
of which are 150, 150, and 160 degrees; the average distance is 153 
degrees. 
One was noted at Sydney, 100 degrees distant. 
This examination simply shows that stations near to an origin 
obtain more records than those at a great distance. 
The average number of records for stations lying westwards from 
the origin is 3°4, and the average distance of these stations from the 
origin was 105 degrees. The average number of records for stations 
