ON SEISMOLOGICAL INVESTIGATION. 



159 



The last observation evidently refers to a phase of movement different 

 from that of the first two, and therefore will not be further considered. 



Padua 

 Ischia 



9,.320 kms 

 9.749 „ 



Velocity 



9" kins, per sec. 

 8-7 „ 



We should expect to have found these two velocities to have been nearly 

 equal. Their mean value, or the probable rate at which motion was 

 transmitted from Japan to Italy, was 



9'2 kms. per sec. on an arc. 

 And about 8'3 ,, ,, ,, on a chord. 



The velocity of transmission to Tokio was about .3 kms. per second. 



Earthquake No. 8 (Cyprus).' 



A severe earthquake took place in Cyprus on June 29, at about 

 8h. 48m. Os. Other records of this disturbance were as follows : — 



1. Shide . 



2. Ischia 



3. Rocca di Papa 



4. Rome 



5. Padua ......... 



6. Catania .......... 8 



7. Nicolaiew . 



The observations 2 to 7 clearly indicate a large error in the obser- 

 vation made near the origin in Cyprus. The only calculations of velocity 

 which can therefore be made are on paths between the Nicolaiew isoseist 

 and the first six places. 



The first and last determinations may possibly refer to the maximum 

 phases of motion, and the three intermediate ones to the velocity alon<^ a 

 path at some depth beneath the surface. 



We have here an illustration of high velocities of propagation, which 

 we sometimes find between places each of which are at a distance from 

 an epicentre. 



Earthquake in Iceland, No. 35, 1896. 



August 26, at about 10.30 p.m. in local time. Very severe shocks 

 originating in or near the Hekla ridge. Many landslides, four houses 

 thrown down. One fissure on the Oelvus River, 6 miles long. New 

 geysers appeared. Great surface changes. 



August 27, 9.15 a.m., also severe. 



' See British Association Report, lfc9R, pp. 199 and 200. 



