1080 Appendix Il: Phytogeography and Geology. 
Relative Humidity per Cent (2 or 3 p. m.)*). 
Al ee : = 2° > 7 ae re 
Pla oS alge | | Bos tee ee Ae 
~ 1a | si 2 24/2/55 /S|4]a/3s/2] 
Alexandria | 54 | 52 | 51 | 53 | 56 | 60 | 61 | 58 | 56 | 58 | 55 | 
Port Said .] 65 | 62 | 59 | 59 | 60 | 62 | 64 | 63 | 62 | 64 | 63 
Ismailia. .| 49 | 43 | 38 | 82 | 30 | 30 | 32 | 34 | 40 | 42 | 47 
Suez 40 | 35 | 32 | 27 | 25 | 24 | 27 | 28 | 80 | 34 | 38 
Cairo 48 | 43 | 34 | 30 | 27 | 27 | 29 | 32 | 39 | 41 | 44 
| l = ) eee eae | Ea - 
Place 3 B\3\% B|s 3 | 2 ma! 2] 6 
ele i|alaql/ajaf{sa}a]/a]3|4 
Alexandria | 7.4) 7.6 | 8.3 | 9.8 | 12.0) 15 3) 17.7| 17.4 16.0 14.7 11 
Cairo. . 7.0 7.5 8.2 9.1 | 10.7) 13.2) 15.9 16.8 15.8 14.6) 10 
Vapour Tension Millimetres (2 or 3 p. m.)*). 
| | - 
: uw a | Pe al ili <p i lar = : 
Pees 0] S| eb ek aps a 
Alexandria | 7.5| 7.6| 9.3| 9.9 12.4 15.6| 18.1| 17.7/ 16.1] 14.6] 10.8 88/123 
Cairo. . id GDh erie he areas “a 10.4} 11.5 meatal 13.1} 12.2} 9.6) 8&1} 9.5 
The rainfall is ight and is not of much importance in most parts - 
except that near Alexandria the winter rainfall is counted upon to some 
extent to supply a certain amount of water while the supply canals are 
temporarly closed for cleaning. To the west of Alexandria the rainfall 
is heavier and a valuable crop of barley is cultivated by the Arabs 
on the belt of country lying near the shore of the Mediterranean. 
The quantity of rain wich has been recorded in each month at 
Alexandria, Port Said, Ismailia and Suez is given here. | 
Monthly rainfall in Millimetres *). 
Alexandria. 
a dat he et ee dee a bk & | eles 
Date glehete 3 o|/> Pl Bles1sis]¢4 
1879 16|13|22/ 1| of 0 | 0/0] o| o| 0| 84] 86 
1880 . 50128|17| 8| 3|0),01]01]| 1| 1) 66 | 62 |270 
188] 1) 99/16} 1) 010) 0) 6 | —|— |) 
1) Lyons: The Physiography of the River Nile and its Basin. — Cairo 1906, 
*) Piroma in Met. Zeitg. (1884), p.34 and (1897), p. 377. 
