TWENTIETH CENTURY TEXT-BOOKS. 
The closing years of the nineteenth century witnessed a remarkable awak- 
ening of interest in American educational problems. There has been elaborate 
discussion in every part of our land ‘on the co-ordination of studies, the bal- 
ancing of contending elements in school programmes, the professional training 
of teachers, the proper age of pupils at different stages of study, the elimina- 
tion of pedantic and lifeless methods of teaching, the improvement of text- 
books, uniformity of college-entrance requirements, and other questions of like 
character. 
In order to meet the new demands of the country along these higher 
planes of educational work, the Twentieth Century Text-Books have been 
prepared. 
At every step in the planning of the series care has been taken to secure 
the best educational advice, in order that the books may really meet the in- 
creasing demand from academies, high schools, and colleges for text-books 
that shall be pedagogically suitable for teachers and pupils, sound in modern 
scholarship, and adequate for college preparation. 
The editors and the respective authors have been chosen with reference to 
their qualifications for the special work assigned to them. These qualifications 
are: First, that the author should have a thorough knowledge of his subject in 
its latest developments, especially in the light of recent educational discussions ; 
second, that he should be able to determine the relative importance of the 
subjects to be treated in a text-book; third, that he should know how to pre- 
sent properly his topics to the ordinary student. 
The general editorial supervision of the series is in the hands of Dr. A. F. 
Nightingale, Superintendent of High Schools, Chicago, with whom is asso- 
ciated an advisory committee composed of an expert in each department of 
study. 
The offer of a complete series of text-books for these higher grades of 
schools, issued under auspices so favorable, is an event worthy of the twentieth 
century, and a good omen for the educational welfare of the future. 
One hundred volumes are comprised in the series. A list of those now 
ready, and of others in preparation, will be sent upon request. 
D. APPLETON AND COMPANY, NEW YORK. 
