120 



Our Surroundings 



to ocean currents, or to the nearness of large bodies of water. 

 London has a temperate climate, while at Cape Bald, Newfound- 

 land, in the same latitude, it is extremely cold. The warmth of 

 London is due to the warm Gulf Stream that washes the shores of 

 England. In certain parts of western Europe agriculture thrives, 

 due to the same warm ocean currents, while in a similar lati- 

 tude on the eastern coast of North America plants will not grow, 

 owing to the low temperature caused by the nearness of a cold 



N.P. 



TIV ^ 



N. FRIGID 



S.P. 



THE ZONES OF THE EARTH 



ocean current. January temperature in San Francisco averages 

 the same as that of Charleston, South Carolina, which is five de- 

 grees of latitude farther south, and the July temperature is the 

 same as that of Halifax, Nova Scotia, which is six degrees farther 

 north. The differences are due largely to the warm winds that 

 blow from the Pacific ocean over the shores of California, and 

 to the warm Japan current which sweeps along her coast. 



