ON SEISMOLOGICAL INVESTIGATION. 



237 



To the above is added the disturbance caused by the Laibach earth- 

 quake, April li, 1895, at 10.18 a.m. 



The origin of No. 1 was South-west Germany ; that of No. 2, which is 

 one of the largest and longest earthquakes yet recorded, is unknown ; 

 No. 52 was in Italy ; while 69 was in Japan. 



The magnetographs are but rarely disturbed, and then, with one 

 exception, only by local shocks. 



Magnetometer Disturbances recorded at the K. iindK. Ilijdrof/retphiscltes Amt. Tula. 



The Director. 



To the above is added a magnetometer disturbance, April 14, 1895, 

 10 hrs. 22 mins. p.m., which probably corresponds to an earthquake felt 

 and recorded throughout many parts of Italy, April 14, at 10 hrs. 18 mins. 

 (in Rome). The origin of this was near Laibach, in Austria. 



For the earthquakes recorded but <iot felt in Europe, the Pola dis- 

 turbances, with one exception, are from one to four hours in advance of 

 the seismograph records. 



Meteorolofjicnl Office, Toronto, Canada. Director, Professor II. F. Sttjpaet. 

 Professor Stupart writes me that he has oompared the list of earth- 

 quakes with the magnetometer traces prior to their disturbance by the 

 electric trams, and does not find upon them any irregularities at the 

 specified times. 



Magnetometer Disturbances recoi-ded at Bombay Government Observatory. 

 N. A. F. Moos, Director. 



In the list on p. 238 the earthquakes referred to are those which were 

 recorded in Europe. Several of these had submarine origins the positions 

 of which are unknown (see List, p. 227). 



The peculiarity of the movements of the magnets, the fact that they 

 are disturbed^ by movements which are not perceptible, that the same 

 movements originated at great distances, and that in some instances they 



