34-] IMPACT OF SPHERES. ! 7 



34. As a more careful study of the theory of impact requires 

 some knowledge of the theory of elasticity, it is generally 

 treated more at length in works on applied mechanics. See, 

 for instance, J. WEISBACH, Mechanics of engineering, translated 

 by E. B. Coxe, New York, Van Nostrand, 1875, Vol. I., pp. 

 667-711 ; A. RITTER, Technische Mechanik, Leipzig, Baum- 

 gartner, 1884, pp. 585-618; J. H. COTTERILL, Applied Me- 

 chanics, London, Macmillan, 1884, pp. 274-280 and 374-386; 

 THOMSON and TAIT, Natural philosophy, I., Part I, pp. 274-284. 

 The general theory of impulsive forces will be given in Chapter 

 VI. 



PART III 2 



