CONTENTS. XV 



CHAPTER XYII. 



EXCRETION. 



PAGE 



Nature of excretion Excrementitious substances Effect of their retention 

 Urea Its source Conversion into carbonate of ammonia Daily quantity 

 of urea Creatine Creatinine Urate of soda Urates of potassa and ammo- 

 nia General characters of the urine Its composition Variations Acci- 

 dental ingredients of the urine Acid and alkaline fermentations Final 

 decomposition of the urine ...... 341-364 



SECTION II. 

 NERVOUS SYSTEM. 



CHAPTER I. 



GENERAL CHARACTER AND FUNCTIONS OF THE NERVOUS SYSTEM. 



Nature of the function performed by nervous system Two kinds of nervous 

 tissue Fibres of white substance Their minute structure Division and 

 inosculation of nerves Gray substance Nervous system of radiata Of 

 mollusca Of articulata Of mammalia and human subject Structure of 

 encephalon Connections of its different parts . . . 365-887 



CHAPTER II. 



OF NERVOUS IRRITABILITY, AND ITS MODE OF ACTION. 



Irritability of muscles How exhibited Influences which exhaust and destroy 

 it Nervous irritability How exhibited Continues after death Exhausted 

 by repeated excitement Influence of direct and inverse electrical currents 

 Nervous irritability distinct from muscular irritability Nature of the 

 nervous force Its resemblance to electricity Differences between the two 



388-397 



CHAPTER III. 



THE SPINAL CORD. 



Power of sensation Power of motion Distinct seat of sensation and motion 

 in nervous system Sensibility and excitability Distinct seat of sensibility 

 and excitability in spinal cord Crossed action of spinal cord Independent 

 and associated action of motor and sensitive filaments Reflex action of 

 spinal cord How manifested during disease Influence in health on 

 sphincters, voluntary muscles, urinary bladder, &c. . . . 398-416 



