252 H. S. WASHINGTON PERSISTENCE OF VENTS AT STROMBOLI 



The most violent vent (though intermittently active), and apparenth^ 

 the largest, was that marked A (figure 1), which is just below the edge 

 of the Sciarra and close to the Filo del Zolfo. This was explosively 

 active when the scene was photographed, and its tall column of dark smoke 

 is partly visible a little to the right of the center of plate 7, behind the 

 clouds from C and D. This vent is known locally as "Fantico," and is 

 that which Bergeat points out as seemingly to have persisted so far baclv 



as the available data allow 

 us to judge. Adopting,, 

 with slight abbreviation, 

 the name given it by 

 Ponte,^ this vent will be 

 called the Zolfo vent. 



The next most impor- 

 tant vent, which was con- 

 tinu.ously active (B in fig- 

 ure 1), is situated in the 

 northwest corner of the 

 terrace, just above the up- 

 per edg6 of the Sciarra and 

 close to, inside of, and near 

 the lower end of the Tor- 

 reone. It is the source of 

 the upper part of the abun- 

 dant white smoke to the 

 right in plate 6, and i& 

 shown in plate 7, on the 

 left, though the perspective 

 makes it appear to be farther from the Torreone than it really is. This 

 vent, as will be shown, is the second persistent vent of Stromboli, and, 

 following Ponte, will be called the Torreone vent. 



Near the center of the terrace were two smaller and quiet vents, C and 

 D of figure 1, which also appear in the center of plate 7. These may 

 be called the Central vents. Below the line of fumaroles, inside the wall 

 of the Filo del Zolfo, was a fifth vent (E of figure 1), which had a very 

 small diameter, and at rather long intervals "blew oif" with a loud blast. 

 and the emission of a very tall and narrow column of smoke. It appeared 

 to be more or less choked by scoria and ashes. The depression is dis- 

 cernible in plate 7. It will be known as the Fumarole vent. 



Figure 1. — Plan of the Grater Terrace of Stromholi, 

 August, 191Ji (Washington) 



^ G. Ponte: Pend. Ace. Line. (5), vol. xxv, 1916, p. 374. 



