INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSU RE AN D AIR TEMPERATURE. 



SEPTEMB ER 



NORMAL PRESSURE. 



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



w 



30" 20* 10* O' 10' 2O' 3O* 40' 



ITO' iecr iTy iey IBO* i4o p 



4O' 30' 20" 10" 0' 10* 2O* SO* 



NORMAL AIR TEMPERATURE. 



SE PTE MB ER 



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



5O" 20" 10 O 10 20 30 40 



Hiith London 



For explan.tion see Key map 



