30 NEW YORK STATE MUSEUM 



December idtJi. A clearly marked record of the earthquakes 

 that shook the city of Mexico on this date. The phases are well 

 .differentiated and give a very close approximation of the distance 

 to the source, about 3000 miles. The larger vibrations are exhibited 

 on the north-south component. Although the record would indicate 

 it to be one of the heaviest shocks of the year, it appears to have 

 done little damage. 



January jist. A good tracing of the earthquake that was central 

 near Valdez, Alaska, when it occurred at about 10.12 o'clock in 

 the morning. The east-west component is the larger. The indicated 

 distance to the source is about 3000 miles. 



March nth. The preliminary tremors are not shown on the 

 record. The origin appears to have been relatively near, perhaps 

 in the West Indies. The Harvard station estimated the distance 

 at about 1000 miles. 



May 6th. A second Mexican quake, felt in the city of Guada- 

 lajara. The record is fairly clear, .but less strong than that of 

 December i6th. The tremors traveled as far as Germany. 



May 22d. The record of a long-distance microseism with a period 

 of from 20 to 30 seconds. It is not clearly separated into phases. 

 An earthquake was reported from the Hawaiian islands on this date. 



June yth. A series of probably related disturbances from a 

 source between 3000 and 4000 miles away, but not definitely located. 

 A volcanic outburst occurred in the Alaskan peninsula about this 

 time. 



June 8th. This probably marks the culmination of the series of 

 shocks which began the preceding day. Besides the heavy disturb- 

 ance, there were light tremors at intervals which were so broken up 

 by interference as to permit no satisfactory readings. The more 

 notable of these minor movements occurred between 4.10 and 4.30 

 a. m., 5.22 and 5.33 a. m., and 7.55 and 8.45 a. m. 



June lotJi. An untraced disturbance about 3500 miles away. 



June 1 2th. A'ery faint record, apparently not connected with the 

 tremors, felt in South Carolina and Georgia the same morning. 



July 8th. A rather strong disturbance with the east-west wave 

 motion more pronounced than the north-south. The estimated dis- 

 tance of the source is about 4000 miles. A heavy shock occurred at 

 Fairbanks, Alaska, about this time. 



PALEONTOLOGY 

 In the reports of several years past, reference has been made 

 to the progress of a memoir on the fossil arachnids or Eurypterida 



