Knowledge. 



I 



SKETCH MAP OF THE WORLD ILLUSTRATING THE EXPLORED (WHI'i: 



The above Map, in illustration o£ the article " On the Exploration of the Surface of the Globe," in the August number of Knowledge, ■ 

 areas of both land and 6ca that either have nerer been traversed, and are therefore altogether unknown, or have been but slightly explored 

 travel, trade, and oecupation by more or less civilized and organized governments, but not thorouglily explored. The spaces left blank sh ' 

 gcodetically. As these areas gi-adually merge into each other, then- boundary lines on the map are not intended to be regarded as prii 

 eijuare miles are as follows :— Africa, 6,500,000 ; Australia, 2,250,000; North and South America, 2,000,000; Asia, 250,000; Islands, 500,000 i 



