440 F. A. Ferret — Lava Eruption of Stromboli. 



November 13 — Paroxysmal explosion at 9.15 a. m., followed 

 by weaker repetitions. No lava outflow, but the lava bocca 

 emits bluish vapor in strong puffs. At 1.30 p. m. an imposing 

 avalanche of the hardened lava insecurely held on the steep 

 slope of the Sciara (36°). 



November 14 — Copious outflow of lava, descending the 

 easterly side of the Sciara but not reaching the sea in continu- 

 ous flow. 



November 15 — Diminished flow. 



November 16. — Outflow continues. One moderate explo- 

 sion. 



November 17 — Conditions not sensibly different. i 



November 18— Copious flow of lava. Fine, full stream 

 descending directly into the sea. 



November 19 — Lava in large amount — great evolution of 

 steam on entering the sea. 



November 20 — Same conditions. Quantity of sulphur 

 dioxide carried down by the wind over S. Vincenzo. 



November 21 — Large amount of lava — bright glow. 



November 22 — Outflow notably diminished. 



November 23 — Outflow nearly ceased from 4 to 10 p. m., 

 then continued in great quantity. 



November 24 — Great quantity of lava. 



November 25 — Diminished outflow. Copious white vapors 

 at the crater. 



November 26 — Little or no lava during the night until 5 

 a. m. At 7.12 strong air concussion followed in less than a 

 minute by a paroxysmal explosion. At 8 a. m. cessation of 

 flow, then a second explosion, small, followed by an abundant 

 outflow of lava, which ceased completely at about 8.30 p. m. 



November 27 — No lava — the bocca gives blue vapor only. 

 At the crater white vapors. 



November 28 — No lava. 



November 29 — At noon a re-fusion at the lava boccas and 

 outflow of lava for a distance of a hundred meters. White 

 vapors without explosion at the crater. Great extension of 

 fumarolic area. 



November 30 — A sluggish lava flow, tending to cease 

 altogether. 



Throughout all this period, when not otherwise stated, and 

 excepting the two great explosions on the 13th and 26th, the 

 gaseous outbursts at the crater continually decreased in inten- 

 sity and frequency. 



We have, thus, an eruption of lava lasting five months, and 

 manifesting powerful explosive phenomena only in the latest 

 phase, in contradistinction to that of 1891 when the emission 

 of lava was spasmodic and was invariably preceded by strong 

 seismic and explosive manifestations. 



