THE DESERT CLIMATE 



26 



of relative humidity at Mosul, Northern Meso- 

 potamia, during an average week in June and an 

 average week in December, shows this point equally 

 clearly. Very similar figures are obtained if the 



Sun. Mon. Tues: Wed. Thurs. Fri Sat. 



484848484848 



Fig. 8. — Relative Humidity at Mosul, N. Mesopotamia, at 8 a.m. and 



4 P.M. DURING AN AVERAGE WeEK IN JUNE AND AN AVERAGE WeEK 



IN December. 



mean of a series of readings is taken. Fig. 9 repre- 

 sents the mean relative humidity taken at intervals 

 of two hours every day from June to September, 

 at Mohammerah, near Basra. The daily fluctuation 

 in the humidity is, of course, less striking because 



