F. A. Perret — Some Kilauean Ejectamenta. 



617 



and guests of the Volcano House, on seeing these drops, soon 

 picked up others beside the trail leading down into the crater, 

 while, by a curious coincidence, an assistant of Professor 

 Brigham, in ascending Ilualalai, found a number of similar 

 ejections, but which are of a larger and coarser habit of forma- 

 tion. It seems probable, therefore, that their production is 

 quite common to volcanoes of this type and that it is the result 



Fig. 



Fig. 



Fine and coarse lava filaments. (Pele's Hair.) 



of a secondary phase of activity in localities of comparatively 

 recent eruption. 



The most common and the most continuously formed of all 

 Kilauean ejecta are the vitreous filaments, commonly called 

 Pele's Hair — so well known and so frequently described as to 

 render superfluous a detailed consideration here. Very fine 

 and very coarse specimens are together reproduced in fig. 7, 

 the straight, thick wire having been found by Miss Thurston, 

 and kindly presented to the writer. The sponge lava or 

 " thread lace scoria " has also been fully described,* and, 

 furthermore, all of this material observed by the writer lay 

 upon the pahoehoe lava in a continuous stratum, indicating 

 formation in situ and therefore not to be included under the 

 head of ejectamenta. 



* Dana, " Characteristics of Volcanoes." 



