L. A, COTTON. 



graphical position of the informant, and estimates of the 

 intensity on the Rossi-Porel scale were noted on each card. 

 A map was then prepared showing the distribution of the 

 recorded intensities. This map was prepared so that it 

 showed no place names, but only the distribution of seismic 

 intensities. From this map the isoseismals were drawn. 



(Fig. 1.) 







