34 Trans. Acad. Sci. of St. Louis. 



the period (2X2) of these oscillations. It should also be ob- 

 served that ^' is of the order of w, i. e. the precessional 

 motion is extremely slow. Finally, as ^' differs from t/t'^ by 

 a quantity of the order of w, the angular velocity of rotation 

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



Issued May 13, 1902. 



