322 THE BOTTOM OF THE SEA. 



lion analagous to the instances we have aheady cited 

 Mackenzie relates that, in the year 1780, he obsersred 

 on the western coast of the island, at the distance oi 

 ten leagues from Reikianess, flames rising from the 

 sea during many months. Afterwards a little island 

 made its appearance. For some time this island 

 vomited flames and stones, and then disappeared 

 again. Immediately afterwards the Skaptaa lokuU, 

 a neighbouring volcano, broke out in eruption. 



6. The Bottom of tlie Sea feels the counterblow of terrestrial 

 Volcanic Phenomena. 



Terrestrial volcanoes and earthquakes are nearly 

 always re-echoed, so to speak, from the bottom of the 

 sea. . Ships experience a shock as if they had passed 

 over a centre of volcanic activity. 



Cracatoa, an island in the Indian Ocean, Mas de- 

 stroyed in 1680 by an earthquake. Vessels at Sii'a 

 felt the shock. 



Gounung-Api, or Gounapi, a volcano in the Mo- 

 lucca group of islands, burst into eruption on the 22nd 

 of November, 1694. Its summit vomite I flames with 

 a great noise. Tlie bottom of the sea was, at the 

 same time, heaved up to the level of the soil of the 

 island, and flames ascended from the waters. 



In 1820, in a bay situated to the west of Gounapi, 



