Chap. IX] 



DESERTS 



607 



At Ghardaia, in 1891, there were 8 rainy days with measurable rain, 46 with 

 a rainfall too small for measurement ; in 1892 such days were respectively 18 and 23. 

 The absolute extreme temperatures at Ghardaia were, in 5 years from 1887- 1892, 

 50° in July 1892, and - i° in December 1889 and January 1891. The annual amount 

 of rainfall was in 1886-1892 (in millimeters), 128, 145, 131, 53, no, 87, 114. 



CAIRO. 



30° 5' N., 31 17' E., 33 meters above sea-level. 



(From Meteorol. Zeitschr., 1891, p. 419.) 



