132 



TRANSACTIONS 



i899-'oo 



or four miles in the average inclination of their boundaries, really 

 exists, all we can say is that instruments have given indications 

 that it can be explained on such a supposition. The fact that the 

 piers carrying some of the instruments have risen from the chalk, 

 and not from the alluvium, and that during long continued wet 

 weather there is a continuous creeping of a horizontal pendulum 

 the heavil}^ loaded valley bottom, and the direction of greatest 

 movement at the time of an earthquake appears to be at right 

 angles to the dip, from which it may be in'ferred that valleys due 

 to geotectonic folding exhibit a certain flexibility, tend to support 

 the idea that the observed diurnal movements are due to actual 

 movements of more or less extensive areas. No doubt some por- 

 tion of the observed effects may be directly attributable to solar 

 radiation. In Toronto and Victoria we have not recorded such 

 movements, and I think it is that our instruments are placed on 

 piers built very substantially and very deep. 



TOTAIv NUMBER OF QUAKES RECORDED AT TORONTO AND 

 VICTORIA, B. C. 



VICTORIA TORONTO 



1897 From Sept. 20 12 



From Oct. 1 1 . 



1898 9 30 



1899 III 135 



1900 25 to Feb. 13th 19 



155 196 



Table Showing Length of Chords in Miles and Kilometers. 



