INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



APRIL 



NORMAL PRESSURE. 



MEAN PRESSURE, NOON, G.M T. 1902. 



1*0* ISO* 160' 170' 180' 170' I6<f ISO 



00 



uot 



3O" 20' JO* O" 10" 20" 30" 40" 



140 ISO" 



4O" 3O' 



NORMAL AIR TEMPERATURE. 



APRIL 



MEAN AIR TEMPERATURE,NOON,G.M.T. 1902. 



0" ISO" ISO' 170' 180 170" ISO ISO t+0" 



40 yf 20 10 O' 10" 20' 30" 4O" 



140' ISO" ISO" 170" 180" 170" 160" ISO* 140" 



SO' 2O" 10" 0" 10' 20" SO' 40 



For explanation see Key map 



