ae eo =: 
el Rt i ee 
ON SEISMOLOGICAL INVESTIGATIONS. 59 
lying eastwards from the origin was 4°6, and the average distance of 
these stations was 102 degrees. 
The average number of records for stations lying northwards from 
the origin was 4°6, and the average distance of these stations was 101 
degrees. 
The average number of records for stations lying southwards from 
the origin was 3°2, and the average distance of these stations was 95 
degrees. ; 
Although the average distance of stations was practically the same, 
the greater number of records had been obtained at stations lying 
eastwards and northwards from the origin. 
District No. 6.—Near New Zealand, or approximately 180° East 
or West, 40° South. 
The earthquakes considered are Nos. 804, 877, 9228, and 1768. 
Each of these four disturbances was recorded in New Zealand, 
and at approximately 180 degrees distance in Great Britain. 
Three were recorded in Toronto, Perth, Honolulu, San Fernando, 
and India. The distances of these stations from the origin are 122, 
52, 65, 180, and 105 degrees; the average distance is 105 degrees. 
Two were noted at Victoria, B.C., Cape Town, Irkutsk, Mauritius, 
Cordova, and Batavia. The distances of these places from the origin 
are 102, 105, 112, 100, 85, and 72 degrees. The average distance 
is 96 degrees. 
Only one disturbance was noted at Cairo and Sydney, the distances 
of which from the origin are respectively 150 and 22 degrees. 
Ten stations with a northerly bearing recorded on the average 2°4 
shocks, the average distance of these stations from the origin being 
109 degrees. 
Cape Town, which has a southerly bearing from the origin, recorded 
two shocks; its distance from the origin is 105 degrees. . 
Material for comparing propagation in these two directions is 
evidently too scanty. 
Three stations to the eastward of the origin recorded on the average 
2°3 shocks, the average distance being 103 degrees. 
Six stations to the westward of the origin recorded 2°1 shocks, 
the average distance being 76 degrees. 
The result of these examinations does not suggest that earthquake 
motion is radiated more freely in one particular direction rather than 
in some other. 
_ For the six groups of earthquakes originating in six different 
districts it appears that more motion has been propagated towards the 
North than towards the South. For the first four groups more records 
were obtained to the westward of an origin than were obtained to the 
East of the same. For Groups 5 and 6 this is reversed, but it 
is based on observations which were comparatively few in number. 
VIII. On the Times of Occurrence of Maximum Motion on Pendulums 
Differently Oriented. 
In the records from certain stations (see British Association Circu- 
lars) we observe that the maximum for East-West motion is frequently 
reached from one to four or even more minutes before that for North- 
