CONTENTS xiii 



PAGE 



Oxidation 202 



Autoxidation 203 



Peroxides 203 



Peroxidase 203 



Guaiacum Reaction 203 



Reduction by Milk 203 



CHAPTER III 



Action of Jointed Bones 204 



Contraction of Muscle 204 



Tension in Muscle -. 204 



Spring 204 



Nerve-Muscle Preparation - 204 



Formation of Acid - 205 



Effect of Length of Fibres - 206 



Structure of Voluntary Muscle 206 



Effect of Temperature 206 



Production of Tetanus 206 



Heart Muscle 207 



Staircase 207 



"All-or-Nothing" 207 



Refractory Period 208 



CHAPTER IV 



Spinal Frog 209 



General Anatomy of the Nervous System - 209 



Nerve - 209 



Structure 209 



Electrical Change 210 



Unexcited by Light or Sound - 210 



Receptors of the Skin 210 



Taste-Buds 211 



Olfactory Cells - 211 



Heat and Cold Spots - 211 



Hearing - 212 



The Eye - 212 



Visual Purple - 212 



Anatomy 213 



Image on the Retina - - 213 



Structure of the Retina 214 



Receptors for Position - 214 



Statocyst of Cyclas - 214 



Semicircular Canals of Skate - - 214 



CHAPTER V 



Anatomy of Central Nervous System of the Frog - 215 



Sympathetic System of the Frog 215 



Anatomy of the Central Nervous System of a Mammal 216 



Spinal Neurones - 216 



Spinal Reflexes 216 



Inhibition - - 217 



The Vagus in the Frog 217 



