CLIMATE. 



235 



Wilkes found that the mean temperature for January 

 and February on the coast of Wilkes Land was 30*2° 

 F., and the extremes were 34*52° F. and 23° F. East 

 of Graham's Land, Ross observed south of latitude 64° 



h ',/'// A Kegion within 

 which the isothermal 

 line of 50° oscillates in, 

 the course of the year. 

 tl ! 1 Region within which the 



isothermal line of 41° oscillates in the 



course of the year. 



Map of the distribution of temperature (after Neumayer — by Haardt). 



S. on the 6th of February, 1843, in latitude 64° 12' S. 

 and longitude 56 49/ YV\, a maximum of 44*96° F., but 

 on the 15th of January, 1843, in latitude 64 32' S. 

 and longitude 56° 53' W., a minimum temperature of 

 23*54° F., that is to say, at a time of year which 

 corresponds to the month of July, at the height of our 



