384: Wood — Effects in Mokuaweoweo of the Eruption of 191If. 



portion of the elevated platform south of it. (See the maps, 

 figs. 1 and 13.) Photographs were made both by Mr. Green 

 and by the writer. 



Again on December 15, 1914, while the recent eruption was 

 still in progress, the writer was one of a party to reach the 

 crater margin, at the identical place where his previous stay 

 was made, at about 1.15 p. m. This time a little less than an 

 hour was available for observation of the eruptive action and 

 of changes in conditions in the crater. Photographs were 

 made by Prof. T. A. Jaggar, Jr., and by the writer. 



In August, 1915, the third expedition was carried out. 

 Camp was established again in the same spot, on August 18. 

 The summit was reached at 10.30 a. m. Camp was broken in 

 the early morning of August 28, making a stay of almost ten 

 complete clays on the summit plateau. A general reconnais- 

 sance was made of the crater — on its floor, more especially in 

 the northern and central parts west of the axis — , and of the 

 summit region on the northeast, east and south. A great 

 many photographs were made. 



A thorough account of the results of these expeditions to the 

 summit area must be left for a later time. This will require a 

 somewhat extended study. But a statement of the effects pro- 

 duced by the 1914 eruption in Mokuaweoweo will be attempted 

 here on account of the immediate interest these possess. To 

 do this previous conditions must be described since no succinct 

 account is extant. 



No map of Mokuaweoweo has been made since that sur- 

 veyed by J. M. Alexander in 1885. Nevertheless the outline 

 of the crater and its walls have changed only slightly since 

 then. Through further collapse a deep pit of small area has 

 formed, making a shallow recess in the east wall of the crater 

 near the north end of the central depression. Also, on the 

 west wall there have occurred, probably, small, further, partial 

 collapses ; one close by the north end of the central depression, 

 the other a little south of the north end of the crater as a 

 whole. These changes barely affect the general outline of the 

 crater. Its floor, however, has changed very markedly. 



This map of 1885 necessarily forms the base for this work. 

 It is here re-drawn (as fig. 1) since at present it is not available 

 in a form well adapted for reproduction for printing. 



Attention must be directed to conditions as mapped in 1885. 

 There was then a large central depression terminated east and 

 west by cliff walls rising directly to the summit plateau, but at 

 the south and north limited by cliffs of less height rising to the 

 surfaces of depressed, crescentic benches which have been 

 known respectively as the " south lunate platform " and the 

 " north lunate platform." Beyond the south lunate area the 



