Ch. XVI.] EXPLANATION OF CYCLONES. 307 



Institute of Victoria, in 1857. It was afterwards com- 

 municated by the Astronomer Royal to the "London 

 Philosophical Magazine," where it appeared in January, 

 1859. A suggestion that I at the same time offered, 

 that the opposite rotation of cyclones in the two hemi- 

 spheres was due to the same causes as the westerly 

 deflection of the trade winds from a direct meridional 

 course, has been generally received by physicists, and I 

 am not without hopes that the main theory may also yet 

 be accepted ; but whether or not, I am confident that a 

 study of the smaller eddies of air is the proper way to 

 approach the difficult question of the origin of cyclones. 



