CHAP. XIX. POSITIONS OF THE GREAT ANDES. 339 



the Island of Krakatoa by the blowing away of a portion of the 

 cone during the convulsions which occurred in August, 1883 ; ^ and 

 although it cannot be positively affirmed that the Southern Walls of 

 Chimborazo have been fashioned in this way, one may go so far as to 

 suggest that that which is known to have happened in the Straits 

 of Sunda may also have occurred on the coast of the Pacific. 



The relative situations of the Great Andes of the Equator will 

 be seen by reference to the Route Map, where, for the first time, 

 they are placed in the positions that they actually occupy. The 

 Altitudes which were determined on my journey are arranged 

 in a tabular form in Appendix A, in chronological order. The 

 height of Chimborazo will probably possess more interest than 

 any other for the majority of my readers. I give below the data 

 which have been used in its computation, and a few remarks upon 

 the previous determinations of its altitude by others. My original 

 readings are given here {7iot reduced to. 32° Faht.), and they were 

 not taken until the attached thermometer had fallen to the tem- 

 perature of the air. The Guayaquil barometer, it should be added, 

 was 30 feet above the level of the sea. 



Da- Place. Barome.e. K^f '" ^fiCiZ.. 



Jan. 4, 1880, 5.15 p.m. Summit of Chimborazo No. 558 14-100 21° Faht. 



,, 6 p.m. Guayaquil . . .No. 554 29-893 85° 



Deduced altitude above the level of the sea, 20,545 feet. 



July 3, „ 1.40 p.m. Summit of Chimborazo No. 558 14-050 20° „ 



„ 2 p.m. Summit of Chimborazo . No. 558 14-028 15° 



,, Meanof 11a.m. &6p.m. Guayaquil No. 554 30-021 75° ,, 



Deduced altitude above the level of the sea, 20,461 feet. 



Besides these two results (20,545 feet from the observations 

 made on Jan. 4, and 20,461 feet from the 2 p.m. observations 

 on July 3), Mr. Ellis has obtained a third one (20,489 feet) by 



^ A representation of this forms Plate 25 of the Album accompanying the 

 interesting work Krakatau, by R. D. M. Verbeek, Brussels, 1885-6 ; and it has been 

 reproduced in the Report of the Krakatoa Committee of the Royal Society, Lond. 

 1888, PI. II. 



