﻿42 



The identificiition of the hour marks on the " Discovery " film is uncertain. If, however, we take the 

 first reading as -th. 10'7m. the record is fairly in accord with those which follow and refers to a disturbance 

 originating in or near to Central America. The area disturbed is similar to that given for No. 72. 



A possible approximate origin lies near to 150° E. Long., 50° S. Lat. 



4. March 28. 



Slight tremors were felt at Zamboanga in Mindanao. 



The "Discovery" record suggests an origin not more than 5° distant. The entries for Manila, 

 Batavia, and Irkutsk, however, suggest a distinct disturbance of very large extent which originated in the 

 Southern Philippines at about 6h. Om. If this is the case, the second phase of motion, or Pj, would leach 

 the Antarctic regions at Gh. 26m., or about the time the "Discovery" shock originated. Apparently, 

 therefore, we may ha\'e a case of two shocks related to each other as a primary and a secondary. 



5. March 28. 



As entries corresponding to this do not appear in the registers from Christchurch, Wellington, Batavia, 

 and comparatively near stations, one inference is that the origin was local. 



