372 Mr D. Milne on Earthquake- Shocks felt in Great Britain^ 



and we were every instant expecting another shock. The 

 next was less violent, and fortunatelj- did no damage. But 

 for nine days, we were kept in continual alarm, by slighter 

 tremblings of the earth. The houses here are only from 

 12 to 15 feet in height, as some precaution against the danger 

 of earthquakes. In Cartage, five leagues hence, the effects 

 were dreadful. In less time than I can write, a city of 

 10,000 souls was laid in ruins. The cause of these calamities 

 has been the eruption of a volcano three leagues beyond Car- 

 tage. The last earthquake took place in the year 1822.'' 



25th September 1841. — This was the day on which a re- 

 markable disturbance took place in the magnetic equilibrium 

 of the earth, as indicated by observations on the diurnal mo- 

 tion of the magnets made simultaneously at Greenwich, To- 

 ronto (in Canada), St Helena, Cape of Good Hope, and at 

 Trevandrum (in India).* 



It is stated in the Toronto report of this disburbance, that 

 one had occurred there on the very same day in the previous 

 year ; and that " the months of September and October ap- 

 pear to be those of greatest disturbance." 



No earthquake-shocks are noticed as having occurred on 

 this occasion. 



End of October 1841. — The town of Komorn, on the island 

 of Schutt, in Hungary, at the confluence of the Waag and 

 the Danube, was visited by an earthquake, which shook down 

 all the timber houses, and seriously damaged other buildings. 

 In consequence of this disaster, upwards of five thousand 

 people are said to be ruined, and left without shelter. The 

 general loss is estimated at an immense amount. 



21th December 1841. — At 6^ 30' a.m., in Calabria, there 

 was a strong shock of earthquake, which lasted 15". 



From the foregoing notices of shocks in various parts of 

 the world during the years 1840 and 1841, it appears — 



(1.) That there were only three occasions on which shocks 

 occurred on the same day in difi'erent parts of the world, — 



* Reports of British Association for the Advancement of Science^ 1841, 

 p. 346. 



