CONTENTS 



PAGE 



INTRODUCTION 17 



BOOK I. 



BLOOD. THE TISSUES OF MOVEMENT. THE VASCULAR MECHANISM. 



CHAPTER I. 



BLOOD. 



The Clotting of Blood 24 



The Corpuscles of the Blood : The Ked Corpuscles 37 



The White or Colorless Corpuscles 43 



Blood Platelets 49 



The Chemical Composition of Blood 50 



The Quantity of Blood, and its Distribution in the Body 53 



CHAPTER II. 

 THE CONTRACTILE TISSUES. 



The Phenomena of Muscle and Nerve : Muscular and Nervous Irritability ... 55 



The Phenomena of a Simple Muscular Contraction : 65 



Tetanic Contractions 73 



On the Changes which Take Place in a Muscle during a Contraction : The 



Change in Form '. . 77 



The Chemistry of Muscle 83 



Thermal Changes 90 



Electrical Changes ..'.* 92 



The Changes in a Nerve during the Passage of a Nervous Impulse 97 



The Nature of the Changes through which an Electric Current is Able to 



Generate a Nervous Impulse: Action of the Constant Current 100 



The Muscle-nerve Preparation as a Machine 107 



The Circumstances which Determine the Degree of Irritability of Muscles and 



Nerves * . Ill 



The Energy of Muscle and Nerve, and the Nature of Muscular and Nervous 



Action 115 



On Some Other Forms of Contractile Tissue : Plain, Smooth or Unstriated Mus- 

 cular Tissue . . . 116 



Ciliary Movement 119 



Amoeboid Movements 121 



