400 Wood — Effects in Mohuaioeoweo of the Eruption of '1914. 



real or apparent increase of fuming during the last days of 

 November and the first days of December, 1914. Successive 

 visits up to December 15 strongly indicated that both the 

 fountain action and the fuming had diminished together. 



It was also a legitimate inference, which at the time the 

 writer was inclined to consider favorably, that the increase in 

 fuming and in night illumination, if real, indicated an increase 

 in eruptive action in the summit crater. 



Consequently it is interesting to see that the study of the 

 photographs made on December 15, 1914, with those made 

 more recently, in August, 1915, definitely establish that after 

 the December visit great quantities of lava were discharged 

 from the neighborhood of the elevated pool then observed. 

 Later than December 15, 1914, Hows ran quite to the cliff 

 edge of the northeast platform and both there and all along 

 the west wall (and after this date to a less extent along the 

 central part of the wall of the south lunate platform as well) 

 these flows built up the floor in the western part of the main 

 crater by man} 7 feet. 



As all the evidence visible from the Observatory, whether 

 fumes, or illumination, indicated a cessation of eruption on or 

 before January 11, 1915, these findings lend strong support to 

 the view that visible action at the surface underwent increase 

 during the latter part of December, with genuine increase in 

 the emission of fumes and genuine increase in the brilliancy 

 of illumination. 



Such behavior would accord with the increase in eruptivity 

 in Kilauea during the same fortnight, and could be interpreted 

 as a response to an increase in earth-strain, as indicated by an 

 hypothesis of control by earth-strain variation which is being 

 tested at Kilauea. An exposition of this hypothesis is nearly 

 ready for the press. 



Such action is also in accord with the usual circumstances of 

 the sporadic activity in Mokuaweoweo. For during its long, 

 dormant intervals only very small quantities of fumes escape 

 there. 



Specifically touching on this point, contrasting the activity 

 in Mokuaweoweo in 1896 with that in Kilauea as he knew it, 

 Dr. Benedict Friedlaender wrote : 



"... the differences between the activity of Kilauea lake 

 and that of Mokuaweoweo are to be enumerated. From the 

 molten lava of Kilauea there arises only a thin smoke, that in the 

 reflected light is intensely bluish, and if looked at against the 

 bright sky, yellowish brown. A volcano cloud proper does not 

 exist as a rule, and only under certain circumstances, mostly in 

 the early morning and again at sunset. The invisible overheated 

 steam will condense to a cloud, but I invariably noticed that the 

 seeming volcano cloud was a free, floating mass of condensed 



