CLIMATE OF SOUTH AMEEICA. 



29 



In the nortliern hemisphere the zone of fjords, representing the work of ancient 

 glaciers, is shifted nearly 430 miles farther from the equator, that is, to 48° north 

 latitude, where the Strait of Juan de Fuca gives access to the great fjord known 



Fig. 10. — ISOTHKRMAL LiNES OF SoUTH AMERICA. 

 Scale 1 : 55,000,000. 



^^^""^v-i^^ 



40' 



West oF Greenwich 80° 



40° 



Under 23" F. 23° to 50°. £0° to 60°. 60' to 66°. 68" to 77°. 77' to 86°. 86° and upwards. 

 _^^^^_^^^^___^_^^^_ 1,240 Miles. 



as Puget Sound. Thus South America, although its terminal point falls short of 

 56° south latitude, lies none the less, to some extent, well within the glacial zone. 

 Another factor contributing not a little to the cooling of the South American 

 continent is the marine current which sets from the Antarctic regions straight 

 for Tierra del Fuego, and which continues its northerly course along the west 



