F. A. Perret — Lava Eruption, of Stromboli. 455 



At Sakurastrima, on March 12, 1914, the lava, at one place, 

 was entering a sea as smooth as glass, yet the evolution of 

 steam was spasmodic and resulted in a series of puffs, of which 

 one of the photographs taken by the writer might be mistaken 

 for a copy of another made at Stromboli in 1915. In the case 



Fig. 5. 



Fig. 5. The descent of a lava stream on the Sciara into the sea. On the 

 first third of the descent the vapors are of a transparent blue, very actinic 

 and photographing as if white. The middle portion is a cloud of brown 

 dust from attrition of scoriae and below is pure white steam from water 

 vaporization. 



of the smooth sea some disturbance, such as the flaking off of 

 superficial layers of scoriae, exposes fresh, hot surfaces to the 

 water which is momentarily repelled by the sudden evolution 



