410 Mr. Mallet's Notice of the British Earthquake of Nommher 9, 1852. 



recorded, extending over a period of ten centuries, viz., from the ninth to the 

 nineteenth, distributes them thus : — 



"Winter, 56 



Spring, 42 



Summer, 52 



Autumn, 67 



On the whole, whether it may ultimately appear that earthquakes have some 

 distinct relations to season all over the globe, in Great Britain the base of in- 

 duction is too small, and the numbers approach too near to equality, to warrant 

 such conclusions at present. 



M. Perrey has also classified the directions of shocks (horizontal or apparent 

 directions only) of the preceding British earthquakes, as follows : — 



S. to N., 0-48 



N. E. to S. W., 



E. to W., . . 



S. E. to N. W., 



S. to N., . . 



S. W. to N. E., 



W. to E., . . 



N. W. to S. E., 



If we unite those having the same direction, but merely opposite primary 

 motions, we liave. 



North and South, 1-21 



East and West, 3-16 



Intermediate points to the Eastward of North, . . 1-94 

 Intermediate points to the Westward of North, . . 1-70 



If this result be relied upon as on, a sufficient basis, it would indicate that 

 British earthquakes most frequently come from other and more distant centres 

 of disturbance than that assignable to the shock here treated of. 



