84 Trans. Acad. Sci. of St. Louis. 



the period (2X3) of these oscillations. It should also be ob- 

 served that (f>' is of the order of to, i. e. the precessional 

 motion is extremely slow. Finally, as ■^' differs from i/r'^ by 

 a quantity of the order of o), the angular velocity of rotation 

 of the tore about its axis will remain very nearly constant. 



Issued May 13, 1902. 



