Il8 KINETICS OF A PARTICLE. [217. 



217. The general theory of the constrained motion of a particle is 

 treated with special care in the works of Schell, Budde, and Appell, 

 referred to in Art. 159. In Appell's first volume, pp. 445-517, the 

 student will find instructive examples of the application of Lagrange's 

 equations. For more elementary problems, as also for the interesting 

 theories of brachistochrones and tautochrones, the reader is referred, 

 besides the works just named, to the text-books of Tait and Steele, 

 Besant, Price, and Walton's Problems (see Art. 159). 



