278 HYPSOMETRIC ADDENDA. 



hastened to make known in Germany. (Hertha, Zeitschrift 

 fin* Erd und Volkerkunde, von Berghaus, Bd. xiii. 1829, 

 S. 3-29.) The Nevado de Sorata is to the east of the 

 village Sorata, or Esquibel : it is called in the Ymarra lan- 

 guage, according to Pentland, Ancomani, Itampu, and 

 Ulhampu. We recognise in " Illimani," the Ymarra word 

 "illi," snow. 



If, however, in the eastern chain of Bolivia the Sorata 

 was long assumed 3718 French, or 3952 English feet, and 

 the Illimani 2675 French, or 2851 English, feet too high, 

 there are in the western chain of the same country, accord- 

 ing to Pentland's map of Titicaca (1848), four peaks to the 

 east of Arica and between lat. 18 7' and 18 25', all of 

 which are higher than Chimborazo, which is 21422 English 

 or 20100 Trench feet. These four peaks are 



Pomarape 21700 English feet, or 20360 French feet. 



Gualateiri 21960 " " 20604 " 



Parinacota 22030 " " 20670 " 



Bahama 22350 " " 20971 " 



Berghaus has applied to the eastern and western chains 

 of the Andes of Bolivia the investigation published by me 

 in the Annales des Sciences Naturelles, T. iv. 1825, p. 

 225-253, of the proportion (very different in different 

 mountain chains), which the general height of the ridge, the 

 crest, or kamm (the mean height of the passes), bears to the 

 highest summits or culminating points. He finds, following 

 Pentland's map, the mean height of the passes in the eastern 

 chain 12672 French, or 13502 English feet; and in the 



