1138 
MR. C. DAVISON ON THE ANNUAL 
Fig. 16. 
United States and Canada. 
57. A. Perrev, ‘Brit. Assoc. Pep.,’ 1858, p. 23. 
Daration of record, 17th to 19th centuries. Number of earthquakes, 134. 
Period. 
Maximum. 
Amplitude. 
AnTiual. 
December, h 
1 
•46 
Semi-annnal. 
f January, a I 
1 a J 
•15 
Annual barometric . 
November, b and December, b 
1 
New England. 
58. W. T. Brigham, “Volcanic Manifestations in New England, beiiig an Enu¬ 
meration of the Principal Earthquakes from 1G38 to 1869”; ‘Boston Soc. Nat. Hist. 
Mem.,’ vol. 2, 1873, pp. 1-28. 
Duration of record, 1638-1869. Number of earthquakes, 212. 
Period. 
Maximum. 
Amplitude. 
Annual. 
December, b 
•51 
Semi-annual. 
r 
1 
June, b 
December, b 
] 
J 
"25 
Annual barometric . 
November, b 
1 
