94 J. D. Dana — History of the Changes in Kilauea. 



since it shows the central depression or pit of 1868 still well 

 defined, and also the subdivision of Halema'u'ma'u, above 

 alluded to. 



Mr. Coan states, early in October of 1874, that " the great cen- 

 tral depression of 1868 has been filled up by deposits about 200 

 feet," and that the region around the Great South Lake was a 

 truncated elevation nearly as high as the southern brim of the 

 crater.* 



2. Eruption of 1879. — In 1879 (April?) Kilauea was again in 

 eruption ;f for the Great Lake, which had been running over, 

 and whose rim had been raised till nearly as high as the 

 outer edge of Kilauea, was suddenly emptied by a subterra- 

 nean outlet and subsided several hundred feet, leaving nothing 

 but a smoking basin. 



* Coan, this Journal, III, viii. 1874, letter of Oct. 6, 1874. 

 f Coan, ibid., xviii, 227, 1879, letter of June 20, 1879. 



