52 



CELESTIAL, ATMOSPHEEIC, AND 



the Etesians, and do not blow continuously.* These winds 

 were called Ornithiae because they blew when birds were 

 mating, or because migratory birds arrived with them in 

 Greece. 



In Meteorol. ii. c. 6, Aristotle gives directions for drawing 

 a diagram showing the quarters from which the chief and 



FIG. 3. 



Boreas and Aparctias 

 N 



Thraskias 



Argestes "j 

 Olympias > Fj 

 orSkironj 



Zephyros W 



Lips G 



Phoinikias 



AKISTOTLE'S COMPASS. 



best defined winds blew. Fig. 3 has been drawn according 

 to these directions, Z being the position of the rising sun in 

 midsummer, F that of the setting sun in midsummer, D that 

 of the rising sun in midwinter, and G that of the setting sun 

 in midwinter. I is half-way between due north and F, and 

 K is half-way between due north and Z. Athens is supposed 



'''• Meteorol. ii. c. 5, s. 9. 



