Lesson xxxv.] EARTHQUAKES. 24Q 



ing, of eight or ten tons weight, to the distance of 

 40 or 50 yards. When the wave was gone, some 

 parts that are deep at low water, were left quite 

 dry ; for the water returned with the same violence 

 with which it came. At half an hour after 11 

 came a second wave, and after that four other re- 

 markable ones; the first at ten minutes before 12; 

 the second, half an hour b fore l ; the third; ten 

 minutes after 1 ; and the fourth, ten minutes be- 

 fore 2. Similar waves, but smaller, and gradually 

 lessening, continued with uncertain intervals till 

 the evening. 



At Gibraltar, the earthquake was not felt ^till 

 after ten. It began with a tremulous motion of 

 the earth, which lasted about half a minute. Then 

 followed a violent shock : after that, a trembling 

 of the earth, for five or six seconds; then another 

 shock was not so violent as the first, which gradu- 

 ally went off as it began. The whole lasted about 

 two minutes. Some of the guns on the battery 

 were seen to rise, others to sink, the earth having 

 an undulating motion.. Most people were seized 

 with giddiness and sickness, and some fell down; 

 others were stupified ; and many that were walk- 

 ing or riding felt no motion in the earth, but were 

 sick. The sea rose six feet every 15 minutes; 

 and then fell so low, that boats and all the small 

 craft near the shore were left aground, as were 

 also numbers of small fish. The flux and reflux 

 lasted till next morning, having decreased gradu- 

 ally from two in the afternoon. At Madrid, the 

 earthquake came on the same time as at Gibraltar, 

 and lasted about six minutes, 



M 5 la 



