ON SElSMOLOGtiCAL INVESTIGATION. 



11 



take the other theory, although there are diflSculties of detail that are 

 somewhat troublesome. I do not think we are in a position as yet to 

 make any serious calculations. We must get more data and look all round 

 them before engaging in complicated calculations. 



Character of path in three cases on the assumption that the path is not along the 

 chord, but more approximately along the arc. 



Victoria . 



Toronto . 



Mexico 



Shide 



San Fernando 



Bombay . 



Batavia 



Mauritius . 



Cape of Good Hope 



Alaskan, 



Under sea. 



Half sea, half land. 



Half sea, half land. 



Mostly sea, polar archipelago, Greenland 1 



Half sea and land, largely polarj 



Mostly land, Siberia, Tibet. 



Deep sea, east of Asia. 



Siberia, India, Indian Ocean; 



Polar sea, Europe, Africa. 



Victoria 

 Toronto 

 Shide 



Batavia 

 Mauritius , 



Mexico. 



Under N. America. 



>» >i 



Skirting E. of N. America and then under 



Atlantic. 

 N. America, Pole, Asia. 

 N. America, Pole, Russia, Persia, Indian 



Ocean, or by way of S. Pole. 



Batavia . 

 Mauritius . 

 Victoria . 

 Cape of Good Hope 

 Shide 



Ceram. 



East India Archipelago, 

 Indian Ocean. 

 Pacific Ocean. 

 Indian Ocean. 

 India, Persia, Europe. 



Alaskan Earthquakes (333, 327, 338), 

 Assuming constant speed for small distances, we find 9 min. as the 



time from the origin to Victoria 



Hence the following table : — 



