TABLE OF CONTENTS. 



SERIES I. 



NATURE OP THE MATERIAL WORLD ; AND THE SCALE OF UNORGANIZED AND ORGANIZED 

 TRIBES THAT ISSUE FROM IT. 



Lect. Page 



I. On Matter, and the Material World I . . . 25 



II. On the Elementary and Constituent Principles of Things ... 34 



III; The Subject continued 42 



IV. On the Properties of Matter, essential and peculiar 50 



V. The Subject continued 57 



VI. On Geology G5 



VII. The Subject continued 73 



VIII. On Organized Bodies, and the Structure of Plants compared with 



that of Animals 81 



JX. On the general Analogy of Animal and Vegetable Life .... 93 



X. On the Principle of Life, Irritability, and Muscular Power . ... 102 

 XI. On the Bones, Cartilages, Teeth, Hair, Wool, Silk, Feathers, and 



other hard or solid Parts of the Animal Frame 113 



Xn. On the Digestive Function, and the Organs contributory to it ; the 

 different Kinds of Food employed by different Animals; and 



the Continuance of Life through long Periods of Fasting . . 125 



XIII. On the Circulation of the Blood, Respiration, and Animalization . 138 



XIV. On the Processes of Assimilation and Nutrition, and the interest- 



ing Effects to which they lead 151 



XV. On the External Senses of Animals 159 



SERIES IL 



NATURE OF THE ANIMATE WORLD ; ITS PECULIAR POWERS, AND EXTERNAL RELATIONS ; 

 MEANS OF COMMUNICATING IDEAS ; FORMATION OF SOCIETY. 



Lect. Page 



I. On Zoological Systems, and the distinctive Characters of Animals 172 



II. The Subject continued 183 



III. On the Varieties of the Human Race 198 



IV. On Instinct 211 



V. On the distinguishing Characters of Instinct, Sensation, and 



Intelligence 220 



VI. On Sympathy and Fascination 231 



VII. On Sleep, Dreaming, Revery, and Trance; Sleep-walking, and 



Sleep-talking 243 



