72 ANNUAL REPORTS OF DErARTMENT OF AGRICULTURE. 



Bureau itself, one at Washington, D. C. ; one at Northfield, Vt.; 

 and one at Chicago, 111., and partly through the cooperation of a 

 number of additional stations distributed from Panama to Alaska 

 and fiom the Hawaiian Islands to Porto Rico. 



Dui-ing the calendar year 1918, 127 separate earthquakes strong 

 enough to be felt were reported from different parts of the conti- 

 nental United States. The great majority of these did no damage 

 whatever; a few, however, were strong to severe. One of these, 

 occurring on April 21, destroyed the business sections of Ilemet 

 and San Jacinto, in southern California. An equally severe quake 

 occurred on May 28 in New Mexico, but did very little damage. 



The chief earthquake damage in our outlying possessions occurred 

 in Porto Rico on October 11 and 12. The records of this scries of 

 quakes obtained at Washington and Chicago w^ere used by the com- 

 mission especially delegated to study these disturbances. 



In addition to the above regular work certain studies of meteoro- 

 logical phenomena have been made and several brief papers pub- 

 lished. 



