286 



KEPOBT —1889. 



tions were very much impeded by cloud cap. On the 11th of that month 

 a sHght shock of earthquake is said to have been felt at Resina and its 

 neighbourhood, but no satisfactory account was obtainable. Lava could 

 be seen from Naples flowing on the opposite side of the cone on 

 February 15, as also on the 22nd, 25th, 26rh, and 27th. After this the 

 quantity of outflow seems to have diminished, but not to have entirely 

 stopped, for although the activity was fairly marked during March, a 

 slight increase occurred on the 24th, but by the end of the month it 

 practically stopped. The cone continued to increase in height by central 

 eruptive action during the month of April, when, about the 24th, lava again 



Fig. 3. — Diagram of the Summit of the Great Vesuvian Cone, January 6, 1889. 



The letters correspond to those of the preceding Figures, except the following : ?, 

 cone of eruption up to January 6, 1889 ; j, crevass by which the lava of Janu- 

 ary 1, 1889, flowed ; /, opening by which the lava issued at 3 p.bi., January 6, 

 1889, which divides into the tongues V, I", V". 



was flowing on the N.E. side of the great cone. (Fig. 4.) On April 29 

 and 30 and May 1, the slopes of Vesuvius were disturbed by strong and 

 continuous rumbling, and earthquakes were distinctly felt as far as Resina. 

 At 2 A.M. on May 2 (anniversary of the eruption of May 2, 1885), the dyke, 

 which had certainly been in process of formation for some months, and, 

 as I have just shown, had probably already extended down a short way 

 upon the surface of the great cone, giving rise to the constant slight out- 

 flows of lava, reached suddenly for a third or more down the great 



