INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



NORMAL PRESSURE. 



MAY 



MEAN PRESSURE, NOON, G.M.T. 1903. 



I4O* ISO* I6O* 170' 



40* 3O" 



i4o* io* 1*0' iTO* no* iTy ico* So* i 



3O' 20' 10* 0* 10* 2O 



NORMAL AIR TEMPERATURE. 



MAY 



MEAN AIR TEMPERATURE.NOON, G.M.T. 1903. 



I4O* 150* 160* 170" ISO* 170 160 150 140' 



I4O* ISO* 160* 170 180* 170 I60 - 140* 



10* 20' 30 



Huth. Lender. 



For expla.na.tion see Key ma,j> 



