390 Wood — Effects in Mokuaweoweo of the Eruption of 191 f^. 



Turn now to fig. 2c, a photograph from the same view-point 

 made in August, 1915, but with a lens of slightly different 

 focal length. (F, 22 cm .) In this in front of the cone of 1903 

 is to be seen a line of cones, with one of considerable size, 

 extended along a N.E.-S.W. course. The older cone is no 

 longer silhouetted against the west wall, for there the floor has 

 been built up so as to cover the outcropping rock-layers earlier 

 seen at the base of the tains and to bury other features also, 

 thereby raising the junction of wall and floor so much that the 

 line of sight from camp to this junction now passes above the 

 summit of the older cone. Without detailed citation, — care- 

 ful comparison of fig. 2c with fig. 2a will show the obliteration 

 of numerous features seen on the lower west wall in 1913, — thus 

 pointing incontrovertibly to a considerable upbuilding, in the 

 neighborhood of 75 feet (23 meters), of the floor surface at the 

 west throughout the range covered by the view. The gash in the 

 older cone is still visible, but the small depression north of it is 

 almost hidden behind the newer cones. The channel leading 

 to the southeastward and the depressed area of pahoehoe are 

 no longer seen. 



Let us now compare these views with fig. 2b. This photo- 

 graph was taken from the same view-point with a lens of 

 shorter focus on December 15, 1911, twenty-one days after the 

 beginning of eruption. Unfortunately this view is not very 

 clear. However, it can be seen that on that date the line of 

 new cones had already formed, thus obliterating the channel 

 and hiding from vision the depression north of the older cone. 

 The depressed area of pahoehoe, though slightly changed in 

 outline, was still conspicuous. The older cone (and to some 

 extent the newer ones) was still sihouetted against the west 

 wall, and despite the haziness of the photograph it is sure that 

 the junction of the west wall and floor was still much lower 

 than in August, 1915. 



The region immediately surrounding the older cone was 

 visited at close quarters both in 1913 and in 1915. The cone 

 itself has undergone no change. 



In its immediate vicinity there is no new lava, except fresh 

 cinders from the rift-cones nearby. The small depression at 

 the north remains unchanged. See telephotograph view, 

 fig. 7. 



In connection with the latest eruption a fracture was pro- 

 duced at least 3000 feet (900 meters) long, perhaps as much as 

 4800 feet (1150 meters), along a general N.E.-S.W. course. 

 This passed east of and nearly tangent to the older cone. 

 Along this the line of new cones arose, built around orifices 

 out of which sprung fountains of molten foam. For the most 

 part this fracture is an insignificant thing, merely a linear sys- 



