NOTES ON THE JAMAICA EARTHQUAKE 7O1 
movements were of the short, sharp, tectonic type, there being 
practically nothing in the nature of the undulatory surface wave. 
At Port Royal, on the other hand, the surface waves predominated, 
Fic. 2.—Southward facing statue of Queen Victoria, twisted in anti-clockwise 
direction by tortional movements. (Photo by Fuller.) 
the ground rising and falling as the movement pues in the same 
manner as do the waves upon the sea. 
The seismographs were put out of commission at the beginning 
of the shock, and for the nature of the shock personal observation 
must be depended upon. According to the accounts of those who 
were interviewed by the writer, the first vibrations seemed to come 
