41 6 NOTE ON THE MAP OF SOUTH AMERICA. 



course, most apparent in the isothermal for January. It will beseen 

 that at that season the temperature of Northern Peru is about 

 the same as that of Buenos Ayres, lying thirty degrees farther 

 from the equator. In midwinter (July) the effect is far less 

 apparent, and in the south of the continent the isotherms for 

 that season nearly correspond with the parallels of latitude. 

 The lines indicating mean annual temperature naturally assume 

 a course intermediate between those for the extreme seasons. 



PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLES. 



