INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 



NORMAL PRESSURE. 



MEAN PRESSURE, NOON, G.M.T. 1901 



ISO* I6O' 170' 180' '.70 - ISO' ISO' I4O" 



5O I6O I7O IBO 17U IOU 15O 



DECEMBER 

 NORMAL AIR TEMPERATURE. MEAN AIR TEMPERATURE.NOON, G.M.T. 1901 



MO* l0* l0* 170' 180* 170 ltr ISO 1*0' 





10* 80" 3O" 4O* 



140' ISO' 160" 170 s IBO' 170' l0 f ISO' l0' 



3O" 20" lu 



For explana.tion ee Key m&p 



