28 



BULLETIN 1125, U. S. DEPARTMENT OF AGRICULTURE. 



while the Hekian records may better represent Bedrashen and El 

 Marazic and such points on the west side of the valley toward the 

 desert bluffs as Sakkara and Abusir. 



Table 1 shows the normal mean, monthly, and maximum tempera- 

 tures, in degrees F,, and Figure 3 the corresponding curves for 



X !^ i^ 



5o 





//o 



I 



%/oo 

 l*j so 



kl 60 

 $ 60 



\ 



I so 



30 



Fig. 3. — Diagram showing the normal monthly mean maximum and mean minimum 

 temperatures, In degrees P., for Dakhla Oasis and Heluan, Egypt, in comparison 

 with the same for Mecca, Calif., and Tempe, Ariz. 



Dakhla and Heluan, in Egypt, in comparison with the records for 

 Mecca, Calif., and Tempe, Ariz. 



In regard to the behavior of the Saidy offshoots from the Libyan 

 Desert and from Gizeh we have, first, the observations at Mecca 

 and Tempe showing that they display no characters in form and 

 quality of the fruit or in time of maturity by which they can be 

 distinguished as distinct varieties, so they can be treated as one 

 for temperature study; and, second, trees from both these sources 

 have ripened their crops at Mecca with heat units to spare, while 

 at the Tempe garden, though setting abundant crops of fruit, little 

 of it has matured even as far as the processing stage. 



Before taking up the study of the maximum and minimum tem- 

 peratures of the regions involved, it is instructive to plot the monthly 





1 

























1 

















































I 













































































































PZ^"* 





















^^ - 



'7W 



"^ 



VC?- 

















A 



.(<^ 







M\ 

















r 



U 







^^ 



V 















.V 



// 









^ 















/ 



^ ^ 



*-//*" 



"^-^ 





T»V 













> 





7m^ 







■x^ 



^> 













/ 



A 



^'* 







'^>>, 



V 



\ 











/ 



A/ 











^ \ 



\V^ 











.0 



r/ 











^V 



A V 











' ^ 



Y 











N 



>-^^ 









y 



JV^ 



f 













V'l 



V. 







/ 



yP/ 















^\ 



\5 







p J 



^Af 















V 



V 







/\A 



/ 















\ 



v\ 





y* 



y^ . 



/ 







jC 



I'.s'^ 









\^^^ 



v/ 



. P . 



^1 j^ 









^< 



"-^-^ 



N.. 









V ' 



•^-i^J 



>■ 1 /^ 







.y 



fi^ 1 





A ^, 







w ? 



^ 



.itf^ 



^'' 







.y J 



:«/' 





A 



s. 





^j 



? - 



^\y 







y 



^" / 



7 





<> 



pK 







'1. 1 



<f' 







q\ 



'^i^ 



5 





\ 



V\» 





^ / 



V 









A^ 



/ 



/ 







^-T^ 



k 



•^ 











^.Hy 





? 







^ .» 



X's. 











A 



^ Vl 



,1" 









\\ 



^ 











^/ 



/ 











\^ 



V 











/H./ 















k 1 



\ 









M^ 



i 











-^ 



S ' 



V-3. 









«n 



• ' 











1 





"^V 







//^ 



/ 



if 













\\ 



V \ 







'^!by 



A' 















^ \ 



\ 





•»tt'^ 



^,r 







-VI 



s ' 





"P" 



y . y 





< 



\ 





_> 



' ,1 





N 



■^ 





^H ' 



• 







'•w V 





-^.^ 









^-O, i 













'K 1 













J 













■■' '/^A 















