PHYSICAL CLIMATE. 



503 



Cape of Good Hops. 



to 51 '8, while in America it is scarcely from 35'6 to 37*4. The annexed table con 

 trasts temperatures observed at sea : 



It may be concluded, therefore, that as far as 40 of latitude, the warmth of the 

 southern hemisphere is equal to that of the northern, while, considering the Transatlantic 

 climates apart from the Cisatlantic, it is certain that the mean temperatures of the year, 

 within the bounds referred to, under the corresponding geographical parallels, are even 

 greater in South than in North America. Beyond those limits the southern hemisphere 

 appears to have a lower temperature than the northern. Hence large masses of ice 

 descend towards the equator from the southern pole to a much greater distance than is 

 the case in the northern seas. During the surveying voyages of the Adventure and 



