20 Colorado College Studiesj. 



angular velocity is constant, is 



/• 

 But if we consider the cylinder as tilled with liquid and con- 

 sider the motion of this inclosed liquid, 



c=0, 



ar^ = ka, 



k=r\ 



rr=)-r\ 



where r^ is angular velocity of cylinder. Hence the inclosed 

 fluid moves as a solid body. — (See Basset, p. 282, Vol. 2.) 



