WHOLE VOL. 



AFRICA 



71 



HELWAN,* EGYPT 



Lat. 29°o2'N. Long. 3r20' E. Hb= 115.6 m. 



PRESSURE AT STATION LEVEL: COR. TO 0" C. (32° F.) AND TO 



GRAV. AT 45° LAT. 



Means of 24 hours, 30th meridian E. 



700 mm. + 



TEMPERATURE IN DEGREES C. ht = 2.0 m. 

 Means of i(8''+14''+20'' + Min.), corrected to means of 24 hours 



PRESSURE AT SEA LEVEL 

 1,000 mb. + 



