32 



A.NNUAL KI.PORT OF THK 



Records of the Station 



7.")th 

 Meridian 





Beginning of 



Maximum 

 Motion 



End of 

 Vibration 



Dura- 



Dati> 



Vi 



Vs 



Wi 



Motion 



1910 



















h. m. s. 



h. m. s. 



h. m. s. 



h. m. s. 



h. m. s. 



h. m. s. 



June 27 a.m. 



X 



E 



1 03 01 

 1 03 34 









1 13 09 



10 — 



29 a.m. 



N 











4 37 







E 





3 45 14 3 48 49 





4 30 





29 a.m. 



X 



6 13 





6 44 



6 46 



8 20 







E 



6 11 





6 45 



6 48 



8 22 





29 a.m. 



N 

 E 







10 20 27 





11 02 45 





July 3 a.m. 



X 

 E 





4 28 48 

 4 29 18 







4 47 46 

 6 





6 p.m. 



N 

 E 



11 47 59 





12 00 28 



12 01 40 



12 50 



1 02 — 



7 a.m. 



N 



?3 36 23 



3 38 41 



3 57 20 









" 17 a.m. 



N 

















E 





3 13 58 







3 19 32 



5 34 



17 a.m. 



X 

 E 



5 07 41 



5 13 17 



5 21 31 









19 p.m. 



X 

















E 



10 4G 58 



ilO 55 12 



11 01 53 



11 03 04 



11 26 



39 



" 24 a.m. 



X 







11 25 08 



11 30 59 



11 50 



24 





E 







11 19 50 



11 26 05 



11 36 



16 



29 a.m. 



X 



5 48 26 





6 34 28 



6 38 



8 



2 11 





E 







6 36 



6 38 37 



7 57 



1 21 



N. B. These records are from undamped pendulums and the times of maximum 

 motion and range of the pendulums cannot be taken as the basis for the calculation 

 of the motion of an earth particle. 



follows: Pendulum 59B pointing northward, X. 3°38 / 24 // E. 

 Pendulum 59A pointing eastward, N. 93° 38' 24" E. 



Since the last Report a helpful exchange of data including the 

 times of principal phases of seismic motion for recorded quakes 

 has been established with the stations at Albany, N. Y., Ottawa, 

 Canada, Cleveland, 0., and Seattle, Wash. 



The time at the Station has throughout the year been obtained 

 by telephonic comparison with Harvard Observatory. Mr. 

 George M. Flint has performed the ordinary routine work of the 

 instrument room except on Sundays and holidays when I have set 

 up the recording drums. During the summer vacation Mr. 

 Holmes, the janitor, maintained a satisfactory service. 



Seismographic station chart: The accompanying chart, Plate 4, 

 designed to facilitate the work of ascertaining the epicenter of 

 distant quakes, is based upon the determination of the distance 



