DATES OF EGYPT AND THE SUDAN. 5 



in the desert zone rather than among maritime stations. The evi- 

 dences of this in the record of 38 years at Abbasia, a military post in 

 the nnirrigated uplands in the northeast suburbs of Cairo, and in 

 incomplete records at Ismailia on the Suez Canal are discussed in 

 subsequent pages. 



Table I gives the meteorological data for all the stations at which 

 weather records are available in the three great climatic zones, with 

 the characteristic date varieties for each type of climate. 



DESE&T T&OP/GAL 



OESERT SUBT&OFyai. 



MA/?/r/M£ SUS T&OP/C/4L 



FEBRUARY 

 MA/KM 



Jt/A/E 



■JULy 

 /useusr 



SER7EMBER 

 OCTOBER? 

 A/Oi/EMBER 

 OECEf'fBER 





mm 



^^Rsi 



*__S]^ 



^§H? 







5§23> 



SS5* 



■ asi 





SSJ* 







w?~%l 



^^s» 



98SUZ HES&S' 



WMte 



W 9 ^? 



W£M* 







WSSa tt 



■Mi 7 - 



T?g g ** m & i: ^"^y ff^S 



MEAAS 



1 77 t 



MM3.9 



j 7 



^_D--o m * m :{ es wmJ ^T x> ff^ s? SB«s ^^^ 



Fig. 1. — Diagrams shewing the mean monthly relative humidity (in percentage of saturation, dark bars) 

 and the mean monthly temperature (in °F., shaded bars) for 12 stations in Egypt and the Sudan. 



Figure 1 shows the mean monthly relative humidity (in percentage 

 of saturation) by the use of dark-faced bars and the mean monthly 

 temperatures (in degrees Fahrenheit) by the use of tint-lined bars 

 immediately below, in diagrammatic form, for twelve stations in 

 Egypt and the Sudan. 



Figure 2 shows by curves the mean monthly temperature (in degrees 

 Fahrenheit) and the relation of the monthly mean to the assumed 

 '■ zero point" (G4.4° F.) of the date in flowering for the twelve weather- 

 observing stations listed in Table I. 



