208 



S. E. Bishop — Kilauea in April, 1892. 



ago it began to subside, and when I last saw it, it was 40 feet 

 below the level of the floor, having sunk about ten feet during 

 five days. The diameter of the molten lake is just about 900 

 feet, and that of the floor around it averages 1500 feet. 



900' 



Vertical Section of Halemaumau, April 13, 1892. 

 2. 



Ground-plan of Halemaumau in the southwest part of Kilauea. 



Fig. 1 is a ground plan of Halemaumau, and 2, a section of 

 it, as it existed April 13, 1892. In each, A is the Fire-lake of 

 that date 900 feet in diameter ; BB, the level floor of blackish 

 lava around the lake, about 40 feet above the surface of the 

 lake, and 1500 feet in diameter ; CC, the talus-slope making 

 the chief part of the sides of the pit ; D, section of the outer 

 rim of Halemaumau. In the ground-plan, fig. 2, the outer 

 dotted line, is the outline of 1886, as given in Dodge's map ; 

 DDD, depressed areas of the pit of that date, filled up by over- 

 flows of 1889, 1890, 40 feet above the former level ; E, section 

 of former margin of the pit still visible above recent over- 

 flows ; F, former position of Dana Lake. 



The activity of the lake, relatively to its area, is somewhat 

 less than that of Dana Lake as yon witnessed it, although 



