vi PREFACE. 



science of theoretical mechanics as such, the author has constantly 

 kept in mind the particular wants of engineering students, aiming to 

 make it serve as a preparation for the practical applications of this 

 science, and to bring out the utility and importance of the purely 

 mathematical training. General theories are illustrated by special prob- 

 lems and applications in the text, and sets of exercises are inserted 

 to be worked out by the student. 



To keep the whole work within reasonable bounds, the more ad- 

 vanced parts of the subject had to be strictly excluded. Bibliographi- 

 cal references have therefore been given for the use of any who are 

 desirous to pursue the subject farther. In accordance with the ele- 

 mentary character of the work, these references are not to original 

 memoirs, but to such standard treatises as can be expected to be 

 found in a well- assorted college library. 



At a first reading, the Articles 57-87, 181-214, 221-244, 2 7 2 -35> 

 can be omitted, also some of the applications and the more difficult 

 exercises. 



ALEXANDER ZIWET. 



ANN ARBOR, MICH., 

 July, 1893. 



