196 TRAVELS AMONGST THE GREAT ANDES, chap. x. 



(reduced to 32° Faht.) read 15*129 inclies, with air temperature 

 53°-5, and at 11.20 a.m. (red. to 32° Faht.), 15-154 inches, air 

 temp. 56° Faht. In the hour and forty minutes we remained 

 on the top ^ temperature in the shade ranged from 44° to 60° 

 Faht./ though the highest temperature observed at the Hacienda 

 during our stay there was only 49°. Thus, the lowest tempera- 

 ture experienced on the summit of Antisana (44°), more than 

 19,000 feet above the level of the sea, surrounded by ice and 

 snow in every direction for several miles, was only 5° less than 

 the highest temperature observed at the farm, six thousand feet 

 lower. Such an occurrence is unprecedented in my experience. 

 Mr. Ellis, in calculating the height of Antisana, has employed, 

 at my request, the means of the readings at 10.20 a.m., and 

 11.20 a.m., in conjunction with an 11 a.m. observation by Mr. 

 Chambers at Guayaquil (mere. bar. red. to 32° Faht., 29*912 

 inches, with air temp. 80° Faht.), and his deduced altitude for 

 the summit is 19,335 feet. If this determination and that 

 subsequently made of Cayambe are correct, Antisana is the third 

 in rank of the Great Andes of the Equator.^ 



1 We arrived on the summit at 10 a.m., and left it at 11.40 a.m. 



2 March 10, 1880. Summit of Antisana (19,335 ft.) . 10.20 a.m. 53°-5 Faht. 



Do. 



Do. 



Do. 



Do. 



Do. 



I used on this occasion the thermometer attached to the mercurial barometer ; 

 a mercurial maximum thermometer ; a quick-acting plain mercurial thermometer ; 

 and a spirit minimum thermometer. The first-named of these was verified at Kew 

 Observatory, and was re-compared upon return. 1 give in Appendix A a facsimile 

 of the Kew certificate of verification. 



At 10 a.m. on March 9 at the Hacienda of Antisana, temperature in the shade 

 was ■43°*5 Faht.; at 10 a.m. on March 11 it was 45°; and at 11.40 a.m., on the 

 6th, it Avas 48°. 



3 See my remarks on this subject in Appendix A. According to La Condamine 

 and Reiss & Stiibel, Antisana is the fourth in rank of the Great Andes of the 

 Equator (La Condamine, 19,313 ; R. «fe S., 18,885 feet). 



do. 



10.30 



ct.lli 



.50° -0 



do. 



10.85 





45° -0 



do. 



10.45 





45° -0 



do. 



11.15 





50° -0 



do. 



11.20 





56° -0 



