CIRCULAR RELATIVE TO EARTHQUAKES. 47 



8. Were any facts observed having apparently an immediate 

 or remote bearing on this phenomenon ? 



9. What was the intensity of the force in reference to pro- 

 ducing motion in bodies and cracks in walls ? 



NOTE. Please reply to the first question, if to no other for 

 an answer to it is necessary, in order to determine the limits of 

 the commotion. 



The direction of the impulse may have been ascertained by 

 observing the direction in which molasses, or any viscid liquid, 

 was thrown up against the side of a bowl. The remains of the 

 liquid on the side of a vessel would indicate the direction some 

 time after the shock occurred. 



