io6 THE TANGANYIKA PROBLEM. 



A fairly reliable method is, however, afforded by a study of 

 distant photographs of the range, now that the height of the 

 snow-line has been ascertained. From the east the whole 

 range may be seen rising from plains which stand at about 

 4,000 ft. In photographs obtained from these plains 

 the snow, which I ascertained to begin at 13,500 ft., only 

 occupies a third, at the outside, of the total height of any 

 of the peaks, above the plains. The snow-line is, therefore, 

 9,500 ft. above the plains, and, consequently, these data 

 indicate that 16,700 ft. is an outside height for any of the 

 peaks. 



