SOUTHERN CALIFORNIA ATTACKED 7 



that his postulates are derived from data like the 

 following: 



1. Facts concerning the San Francisco quake of 

 1906 whereby it was learned that the movement was 

 lateral or horizontal along opposite sides of the San 

 Andreas rift. 



2. A general inference supposedly "defined by the 

 measurements executed by the Coast and Geodetic Sur- 

 vel," which were supposed to "show that mountain 

 masses are moving through measurable distances." 

 Gaviota Peak for instance is alleged "to have moved 

 twenty-four feet northward in something like thirty 

 years." 



"This movement is away from the source of pressure 

 and consequently indicates a growing strain." 



3. A theory that the stresses are constant and that 

 relief of any strain by an earthquake at one point 

 along a line of stress is followed by increased accumu- 

 lation at another. An inference that the "local dis- 

 turbances of the past eight years in Southern Cali- 

 fornia were regarded as premonitory to a greater 

 one" and that the various small earthquakes of South- 

 ern California, like those of Inglewood, San Jacinto, 

 Calexico, etc., have not been sufficient to relieve the 

 strain supposedly accumulating along the southern part 

 of the San Andreas Rift. 



4. An attempt by him to create a law of periodic 

 recurrences as is set forth in the Bulletin of the 

 Seismological Society of America for March, 1923: 

 "There was a recurrence apparently of less severity 

 in the early nineties; and these earthquakes of 1918 

 and 1920 are major incidents of the latest recrudes- 



