256 H. S. WASHINGTON PERSISTENCE OF VENTS AT STROMBOLI 



D and the 5, 6, 7 of de Fiore — the Central vents. A'^ent 1, spoken of as 

 new, is near m}^ E, the Fiimarole vent. It is somewhat difficult to under- 

 stand the starfish-like set of 

 ridges, but 1 and 1', close 

 under the southern scarp, 

 represent a pair of large 

 vents which developed ear- 

 lier and which also were 

 prominent in the eruption 

 of 1907. From its position 

 near the southern bounding 

 scarp this may be called the 

 Scarp vent. 



Figures 6^^ and 7^^ are very 

 rough plans of the vents in 

 November, 1899, and No- 

 vember, 1898, the latter by 

 A. Sembrine. The corre- 

 spondencies between the dif- 

 ferent vents in these two 

 and in figures 1 and 3 are 

 so obvious that they need 

 not be pointed out. Num- 

 ber 6 of figure 8 represents, 

 of course, an opening of the 

 Sciarra vent. 



Figure 8, a sketch of the 

 condition in November, 

 1895, by Eicco,^^ is rather 

 unsatisfactory, and it is 

 difficult to identify some of 

 the vents. The view was 

 probably taken from the 

 south. Number 1 is obvi- ■ 

 ously the large Scarp vent 

 seen in previous figures. A 

 vent, number 2, behind the 

 edge of the Sciarra, not seen 

 in the figure, but mentioned in the text, corresponds with the Zolfo vent. 



Figure 6. — Plan of Crater Terrace of Stromholi, 

 November, 1899 (Arcidiacono) 



Figure 7. — Plan of Crater Terrace of StromtoU, 

 November, 1898 (Arcidiacono) 



" S. Arcidiacono : BoU. Soc. Sism. Ital., vol, v, 1900, p. 113. 



" S. Arcidiacono : Ibid., vol. iv, tav. ii, 1898. 



18 A. Ricco : Boll. Soc. Sism. Ital., vol. ii, 1896, p. 96. 



