PRACTICAL PHYSICS 



By N. HENRY BLACK 



Science Master in the Roxbury Latin School, Boston 

 AND 



Professor HARVEY N. DAVIS 



Of Harvard University 



Cloth, l2mo, Illustrated, ix and 487 pages, $1.25 



The remarkable record that this text has made in the short period 

 it has been on the market is sufficient testimony as to its adaptability 

 to high school needs. And it is not difficult to sum up the features 

 of the book that give it preeminence in its field. 



It is written by experts in the field who are, moreover, thoroughly 

 acquainted with the needs and limitations of the high school course. 



It is practical in fact as well as in name. It connects the funda- 

 mental principles of physics with the everyday affairs of life, by 

 introducing each subject through some familiar experience, by using 

 the appliances of modern industrial and commercial life as illustra- 

 tions of the principles studied, and by suggesting research questions 

 at ends of chapters that send pupils afield for information. 



The rate of progress is adjusted to the ability of the average class 

 to proceed. The pace is slow in the early part of the book, more 

 rapid later. Topics under any one subject are arranged in what 

 experience has shown to be the most teachable order. 



The manner of presentation shows exceptional skill in the actual 

 work of teaching. The method is inductive and pedagogically 

 sound — first, the familiar facts, then the underlying principles, then 

 the application to less familiar facts. New subjects are introduced 

 by illustrations from daily life — not by definitions. Principles are 

 introduced by illustrative experiments or by appeal to familiar ex- 

 perience — not stated first and illustrated afterwards. 



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