1844.] Memoir on Indian Earthquakes. 983 



Synopsis of the Phenomena of Indian earthquakes. 

 1 . Characteristics of the shocks. 



a. Undulatory shock. 



b. Shock by concussion. 



c. Tremulous shock. 



d. Method of propagation. 



e. Velocity of propagation. 



2. Nature of the movement of the Ground during shocks. 



a. Horizontal or forward movement. 



b. Vertical or " up and down" movement. 



c. Composite or wave-like movement. 



3. Effect on the crust of the earth. 



a. Alterations of level. 



b. Formation of fissures with ejection of water and gases. 



c. Landslips. 



d. Formation of sand cones. 



e. Effects on springs. 



4. Sounds accompanying shocks. 



a. Subterranean sounds. 



b. Sounds in the air. 



5. Meteorological Phenomena. 



a. Barometric. 



b. Thermometric. 



c. Pluviometric. 



d. Winds and storms. 



6. Electric phenomena. 

 7- Volcanic phenomena. 



8. Physiological phenomena. 



9. Concluding remarks. 



a. Geological resemblance of earthquake tracts. 



b. Relation of earthquake tracts to the ocean. 



c. Independent action of forces in Indian earthquake localities. 



Note. — I may mention here that the large quantity of new materials connected 

 with Indian earthquakes, which has come into my possession, since this paper was 

 concluded will probably require the whole to be re-written so as to embody the new 

 information obtained. 



