Notes on the Earthquake of October, 1860. 369 



from 41 to 180, and the increase seems onlj to have been arrested 

 in the 18th century, when these causes were in full activity. The 

 progress of navigation in the Pacific, and the discovery of Ame- 

 rica, have, when we regard the whole world, also enormously 

 increased the number of instances, so that the earthquakes for 

 the whole world were in the l7th and 18th century 35.3 per 

 annum and in the first half of the 18th century alone 3240 in 

 all, while the total number from the 10th to the 15th centuries 

 inclusive was only 532. 



The earliest earthquake in Eastern North America, in the cata- 

 logue prepared by Mr. Mallet ior the British Association, is 

 that felt in New Endand in 1638. The earHest in Canada is 

 that of 1663. The following list taken from the Report above 

 referred to and other sources, includes all the subsequent earth- 

 quakes recorded as having affected Canada, or the neighbouring 

 parts of America. 



1638, June 2, New England. — Violent, two shocks, direction N. W. & S. 



E., houses thrown down. 

 1658, April 4, « Violent. 



1660, January 31, " « 



1662, January 26, " Violent, three shocks, chimneys thrown 



down. 

 " Nov. 6, « 



1663, February 5, Canada. — Very violent, succeeded by minor shocks 



until July following, ice broken up, 

 rivers discoloured, cliffs and banks 

 thrown down, buildings injured : ex- 

 tended to Nova Scotia and New Eng- 

 land. 

 1665, February, 24, " At Tadoussac and Malbaie, violent. 

 " Oct. 15, " Violent, accompanied by loud noise. 



1668, not dated, New England. 



1669, " " 



1727, Nov. 9, " Violent, followed by slight shocks, direction 



N. E. to S. W., loud explosions, earth 

 opened at Newbury, and ejected sand, 

 &c. 



1728, January 30, New England. 



" Aug. 2, " Slight shocks continued from November 



1727 to this date. 



1729, March 25, « Repeated slight shocks from this date till 



1741. 



1732, September 5, Canada, New England and aafar as Maryland, build- 

 ings injured. 



1737, February 6, New England. — At Boston, one shock. 



