THE DESEET CLIMATE 7 



period coincide is of great importance to the vege- 

 tation, which has to protect itself simultaneously 

 against drought and heat : furthermore, the dry 

 and hot period is very long. 



Within the limits of the Great Palsearctic Desert 

 there are a few places which do not have a cold 



XII I II ill IV V VI VII VIII IX X XI XII 

 3 in.T — ' ' — ' — ' ' ' ' — ' — ' — ■ — ' — r 75(u m. 



SOmm 



25 mm. 



Tashkent.TurKestan 



> Baghdad, Mesopotamia. 



o.oooChaman. Baluchistan Port Said, Egypt. 



Bahrein. Persia. 



Fig. 1. — Average Monthly Rainfall of Five Places in the Great 

 Pal^iarctio Desert. 



wet season and a hot dry season. The area of the 

 Indian desert (Fig. 2), in Rajputana, Sind, and the 

 Punjab, is an exception, as owing to the monsoon 

 the majority of its rain falls in July or August : 

 in most stations in this area a small fall of rain 

 occurs also in early spring. 



