UNIVERSITY MANUALS 



A NEW SERIES OF 

 USEFUL AND IMPORTANT BOOKS 



EDITED BY PROFESSOR WM. KNIGHT 



CHARLES SCRIBNER'S SONS, Publishers 



""THIS Series, published by John Murray in England 

 1 and Charles Scribner's Sons in America, though 

 the outgrowth of the University Extension movement, 

 is designed to supply the need so widely felt of author- 

 ized books for study and reference both by students 

 and by the general public. 



The aim of these Manuals is to educate rather 

 than to inform. In their preparation, details will be 

 avoided except when they illustrate the working of 

 general laws and the development of principles ; while 

 the historical evolution of both the literary and 

 scientific subjects, as well as their philosophical sig- 

 nificance, will be kept in view. 



The remarkable success which has attended Uni- 

 versity Extension in England has been largely due to 

 the union of scientific with popular treatment, and of 

 simplicity with thoroughness ; qualities that win the 

 general reader everywhere, and that in America make 

 several of the Manuals highly useful as text-books. 



