﻿NO. 7 



SMITHSONIAN EXPLORATIONS, I926 



The mountain is 5,200 feet above sea-level and quite 2,000 feet 

 above the plateau. The whole massif is composed of chocolate-colored 

 rock with very little soil, though sparsely tufted with bunches of dry 

 bush and grass, with here and there a queer cactus or dwarf tree. 

 The cliffs are seamed into great cubes and the slopes are littered 

 with fallen fragments. 



The summit is like a cup with a flat bottom about half a mile 

 in diameter and a steep rim 1,000 feet high. From a Y-shaped 



Fig. 3. — The precipice at j\It. Brukkaros leading up to the bottom of the cup. 

 The water pools are just below the precipice. 



])reak in the southeast side of the rim a precipice 60 feet high leaps 

 to the bed of the dry stream, which leads down a 3-mile corridor 

 to the plateau. 



Since the observations require the use of the bolometer, that 

 electrical thermometer sensitive to a millionth of a degree, they 

 require very constant temperature surroundings. These are most 

 easily obtained by making a horizontal shaft or cave, some 30 feet 

 deep, right into the slope of the mountain near its summit. 



The average yearly rainfall is 3^ inches. Dr. Abbot was 12 

 days in the vicinity during March, which, equally with February, is 



