ALTITUDE OF THE EARTH. ] 1 



30. The Atlas Mountains in Africa, in 32 o N. i,., 

 penetrates the snow-line ; their highest summit being 

 1378 ft. 



31. The Peak of Teneriffe, in 28 17' N. L., does 

 not quite reach the snow-line ; its height being only 

 12,175ft. 



32. The Pic d" Orizaba in North America, in 20 

 N.L., penetrates the snow-line ; its height being, ac- 

 cording to Humboldt, 17,406 ft. 



33. Popocatepetl, in 19 3' N.L. (being, according 

 to Humboldt, 17,678 high), penetrates the snow-line, 

 the height of which is 15,027 ft. 



34. MownaRoah,mOw\\y\\ee in the Pacific Ocean, 

 in 19 N.L., is divested of snow during the month of 

 June : its height is, according to King, 15,432 ft. 



35. Cayambe in South America, and under the 

 Equator, nearly reaches the snow-line ; its height 

 being, according to Humboldt, 19,535 ft. 



36. Pichincha in Quito, likewise under the Equator, 

 approaches the snow-line: its height is 15,974 ft. 



37. Chimborazo in Quito, in 1 27' s. L., is covered 

 on its summit, to a great extent, with perpetual snow; 

 its height being, according to Humboldt, 21,464 ft. 



38. The Volcano Cotopaxi, to the south-east of 

 Quito, penetrates to a great extent beyond the snow- 

 line ; its height being 18,870 ft. 



