CONTENTS. 



Introduction. 



Chapter I. — General description of effects of the earthquake . 

 II. — More lengthy notices of the earthquake 

 III. — The earth fissures and sand craters, and their origin 

 IV. — The position and extent of the seismic vertical 



V. — Of the depth of the seismic focus .... 

 VI. — Of the velocity of motion of the wave particle 

 VII. — Of the rate of translation of the wave . 

 VIII. — Of the shape and extent of the seismic area 

 Appendix. — Simple instructions for earthquake observations. 



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46 

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81 

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