1 6 Mr. Edward Arnold's Autumn Announcements 



between elementary books and specialized works on advanced 

 electrical engineering. Second and third year students will here find a 

 book dealing with the broad principles of electrical machinery without 

 entering into all the details of its practical construction and design. 



In thoroughly revising the book for a second edition, the translator 

 has further added several valuable sections on the rise of tempera- 

 ture of electric motors under continuous and intermittent loads, on 

 the Rosenberg constant-current variable-speed dynamo, and on 

 six-phase rotary converters. 



AN INTRODUCTION TO 

 THE THEORY OF OPTICS. 



By ARTHUR SCHUSTER, Pn.D., Sc.D., F.R.S., 



HONORARY PROFESSOR -OF PHYSICS AT THE UNIVERSITY OF MANCHESTER. 



Second Edition. With 180 Illustrations. Demy 8vo., cloth. 155. net. 

 The second edition of Prof. Schuster's introduction to the study of 

 the advanced theory of optics has had the advantage of complete 

 and thorough revision by the author. Among the new matter added 

 may be especially mentioned the fuller account of Michelson's and 

 other methods for the absolute determination of wave-lengths, and 

 the direct comparison of the lengths so determined with the French 

 standard metre. 



ELEMENTARY PHYSIOLOGY 

 FOR TEACHERS AND STUDENTS. 



By W. B. DRUMMOND, M.B., C.M., F.R.C.P.E., 



MEDICAL OFFICER AND LECTURER ON HYGIENE TO THE EDINBURGH PROVINCIAL COMMITTEE 



FOR TRAINING TEACHERS. 

 AUTHOR OF ' AN INTRODUCTION TO CHILD STUDY," ETC. 



With Illustrations. Crown 8vo., cloth. 25. 6d. 



This work differs from the usual type of text-book on Elementary 

 Anatomy and Physiology in several important particulars. In the first 

 place special reference is made throughout the book to the differences 

 between children and grown people. For example, there are special 

 sections dealing with the diet of children, with the peculiarities of 

 the child's skeleton, and with the nervous system in childhood. 



In the second place, those organs and systems are described most 

 fully which are of special importance in reference to the care of 

 children. Thus, the skeleton and muscles are described in greater 

 detail than usual in works of the same size in reference to physical 

 training. The effect of exercise on the different organs of the body 

 is discussed. Considerable space, as might be expected in a book 

 intended for teachers, is devoted to the nervous system. 



Lastly, while the work does not deal directly with either hygiene 

 or education, the bearing of physiology on these subjects has been 

 kept in view throughout. 



LONDON : EDWARD ARNOLD, 41 & 43 MADDOX STREET, W. 



