CHIMBORAZO, a celebrated mountain of the Equatorial Andes, in S. Lat. 1. 30, W. Long. 79, and long considered the highest in the known world. It is 21,424 feet high. It was ascended by Humboldt and Bonpland in June 1802 to the height of 19,286 feet; and again by Boussingault in December 1831 to 19,689 feet.