INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEV EL PRESSURE AND AIR TEMPERATURE. 



APRIL 



NORMAL PRESSURE. 



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



I4O* ISO' I6O' 170* 180* I7O' I6(T 150* 140' 



2O' 30' 40' 



l0' ISO' 160* 170* > 180* 170' 160* ISO' 140' 



NORMAL AIR TEMPERATURE. 



APR IL 



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



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



For fxvlii.ria.tinn see Key map 



