'''INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 

 NORMAL PRESSURE. M EAN PRESSURE, N OON, G.M.T. I 9 3 . 



I4O* ISO' 160' 170' 180* I7O* 160 ISC' 140' 



\ 



~SO 2O' 10* 0" 10" 2O' 30' 40' 



I4O* ISO' 160' 170 180' 170' I8O' ISC' 140' 



30' 20" 10' O' 10' 20' 8O' 40 



NORMAL AIR TEMPERATURE. 



DECEMBER 



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



I4O' IK)' 160' 170' 



170 160 ISO 1*0" 



I4O* iso' io' iTO' 160* 170' 



iao* _ 140' 



so' 20" Kr o* io' 20' so 



For i-(.lnn t.i.,i, see Key ma.p 



