PREFACE TO THIRD EDITION 



IN revising this work my aim has been to fulfill the original 

 purpose of the book in so far as possible. Dr. Jones said 

 in the preface to the first edition: "This volume has been 

 prepared with a view of presenting, in as convenient form 

 as possible, the essential facts of modern physiology as related 

 to the practice of medicine." This object has been kept in 

 mind in the preparation of the third edition. 



In this edition the Introduction, the chapters on The Cell, 

 The Elementary Tissues and on the Blood have been entirely 

 rewritten and new illustrations added. A new chapter, with 

 illustrations, on The Physiological Characteristics of Muscle, has 

 been added. The chapter on Secretion has been rearranged. 

 New subject matter has been added to the chapter on The 

 Physiology of Digestion and Absorption. Other minor changes 

 have been made throughout the book where such were deemed 

 advisable. 



Especial acknowledgment is due to Dr. Robert G. Stephens 

 for his valuable work in preparing the second edition. 



In the preparation of this edition, no claim to original inves- 

 tigation is made. I have freely used the works of other authors 

 when necessary. 



ATLANTA, GA. ALLEN H. BUNCE 



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