55 



A possible origin is 150 E. Long, and 10 N. Lat. With this supposition, however, a very much 

 smaller amplitude would be expected for Perth, and the disturbance should have been noted at Tokyo, 

 Victoria, Christchurch, and Wellington, which was not the case. Another possible origin is that given 



for No. 46. 



45. August 7. 



At Palembang, in Sumatra, where the shocks were severe, the time given is 11.49, and for Benkoelen 

 11.35. 



From these notes the inference is that the origin was nearer to the S.E. extremity of Sumatra, about 

 5" N.W. from Batavia. 



With the assumption that the largest waves travelled at a rate of 3 kms. per second, the time at the 

 origin as derived from the records from Batavia would be 11.48, and from the Perth record 11 47 -6, results 

 which accord with the time noted at Palembang. For P 3 to reach , the " Discovery," 80 distant, 

 would take 49 minutes. The Antarctic record for maximum motion, if it refers to the Sumatra earthquake, 

 instead of reading 11.37, should read 12.37. As the " Discovery " observation appears to be correct, it 

 is interesting to note that 16 minutes after the commencement of a somewhat severe earthquake in the 

 Antarctic, a large earthquake originated near Sumatra, 80 distant. And 16 minutes is the time 

 which preliminary tremors would take to traverse the path of that length. 



August 8, 6h. Om. to end of the day the light was out. 



46. August 10. 



From the time observations the inference is that this earthquake, like No. 44, originated at a spot about 

 50 distant from Perth and Batavia. The amplitude records, however, suggest that the origin was 

 much nearer to the former station than to the latter. It might also be at a spot nearly equally distant 

 from Bidston and the "Discovery." The duration of the preliminary tremors at Batavia and Perth 

 suggests an origin about 50 distant from these two places. A position roughly in accordance with 

 these conditions would be about 50 E. Long, and 30 S. Lat. 



August 16, 2.30, to 18, 3.51, light cut off by snow, which filled the slit. 



