

THE 



THEORY OF SCREWS 



A STUDY IN THE DYNAMICS OF 

 A RIGID BODY. 



BY 



ROBERT STAWELL BALL, LL.D., F.R.S.", 



ANDREWS' PROFESSOR OF ASTRONOMY IN THE UNIVERSITY OF DUBLIN, 

 AND ROYAL ASTRONOMER OF IRELAND. 



DUBLIN: 

 HODGES, FOSTER, AND CO., GRAFTON-STREET. 



BOOKSELLERS TO THE UNIVERSITY. 

 1876. 



