EARTH PULSATIONS. 331 



before which there had been an earthquake at Malta. 

 On April 4 (March 23), 1868, an agitation of the level 

 had been observed by Mr. Gromadzki, five minutes before 

 which there had been an earthquake in Turkestan. 

 Similar observations had been made twice before. These, 

 however, had not been connected with any earthquakes — 

 at least, Mr. Darwin remarks — with certainty. 



Phenomena analogous to the penduluTn and level 

 observations, — As examples of phenomena which are 

 analogous to those made on pendulums and levels, the 

 following may be noticed. On March 20, 1881, at 9 p.m. 

 a watchmaker in Buenos Ayres observed that all his 

 clocks oscillating north and south suddenly began to 

 increase their amplitude, until some of them became 

 twice as great as before. Similar observations were made 

 in all the other shops. No motion of the earth was 

 detected. Subsequently it was learnt that this corre- 

 sponded with an earthquake in Santiago and Mendoza.^ 



Another remarkable example illustrating the like 

 phenomena is furnished by the observations which were 

 made on December 21, 1860, by means of a barometer in 

 San Francisco, which oscillated, with periods of rest, for half 

 an hour. No shock was felt, nor is it likely that it was a 

 local accident, as it could not be produced artificially. On 

 the following day, however, a violent earthquake was 

 experienced at Santiago.^ 



At the time or shortly after the great Lisbon earth- 

 quake, curious phenomena were observed in distant 

 countries, which only appear to be explicable on the 

 assumption of the existence of earth pulsations. 



Thus at Amsterdam and other towns, chandeliers in 

 churches were observed to swing. At Haarlem water was 

 ' Mefeorologia Endogena. ' Hid. 



