REPORT OF THE DIRECTOR I912 



29 



vicinity, particularly with respect to the heavy mantle of glacial 

 sands and clays which cover the bedrock, are not incompatible with 

 such service. The instruments belong to the lighter pattern of the 

 horizontal pendulums and are not capable of a magnifying ratio 

 of more than ten to one in the average run. They possess, how- 

 ever, the requisite sensitiveness for recording legibly the tremors of 

 all heavy or damaging quakes throughout the seismic zones of this 

 and other countries. There are in the local files tracings from such 

 widely separated origins as California, \'alparaiso, Kingston, the 

 Himalayan region, Turkestan, Messina, Mexico, Costa Rica, Ice- 

 land, northern Alaska and Turkey in Europe. The smaller distant 

 quakes, as well as the very slight jars from nearby sources, appear 

 to be beyond the capacity of the instruments to register. 



The general care of the instruments during the year has been 

 assumed by Mr R. W. Jones. With their increasing age, they have 

 required more attention to maintain them in working order, espe- 

 cially on account of their liability to rust. The station is very damp 

 during the summer months and then they have to be frequently 

 dismantled and thoroughly cleaned. As yet, no provision has been 

 made for their removal to new quarters, and their maintenance in 

 their present place will entail added labor for the future. In case a 

 new station should be equipped near the present location of the 

 Museum, it would appear advisable to instal one of the newer 

 types of seismographs for registration of the smaller quakes, along 

 with the present instruments which are well adapted to the registra- 

 tion of macroseisms. 



RECORD OF EARTHQUAKES AT ALBANY STATION, OCTOBER I, I9I I TO 



SEPTEMBER 30, I912 



Standard time 



DATE 



Beginning 

 preliminaries 



Beginning 



principal 



part 



Maximum 



End 



Maxi- 

 mum 

 ampli- 

 tude 



1911 

 December 16 



1912 



January 31 



March 11 



H M 



2 20^ P. M. 



3 20 P. M. 



H M 



2 36 P. M. 



3 35i P. M. 



5 38^ A. M. 



2 19 P. M. 



10 18 P. M. 



H M 



2 38 p. M. 



3 36 P. M. 

 5 39 A. M. 



2 20j P. M. 

 10 22 P. M. 



H M 



3 30 P. M. 



4 25 p. M. 

 6 00 A. M. 

 3 20 P. M. 



11 00 P. M. 

 6 17 A. M. 

 8 35 A. M. 



2 30 P. M. 



3 40 A. M. 



12 30 P. M. 

 8 30 A. M. 

 6 00 p. M. 



mm 

 15 



10 

 3 



7 

 4 



May 6 



May 22 



June 7 



2 06i P. M. 

 9 Soi P. M. 

 5 56^ A. M. 

 7 41 A. M. 



1 40 P. M. 



2 46 A. M. 

 II I5i A. M. 



7 495 A. M. 

 4 57i P. M. 



June 7 



June 7 



June 8 



June 10 



June 12 







1 







I 



3 Oli A. M. 

 II 33i A. M. 



3 05^ A. M. 



II 38i A. M. 



7 59 A. M. 



5 iSl p. M. 



10 

 8 



A 



July 8 



5 I7f p. M. 



8 



