CONTENTS. 317 



Different effects of instinct and intelligence HO 



Division of Instincts into, 1. Pure instincts. Examples 111118 



2. Instincts which can accommodate themselves to peculiar circumstances 

 and situations, or such as are improvable by experience and observa- 

 tion. Examples 114 



Of the notion that animals are machines. Nature and extent of their 



faculties 115116 



CHAPTER IV. 



OF THE SENSES. 



Senses never more than five. All sensation conveyed by nerves 117 



1. Of Smelling. Its seat in the pituitary or Schneiderian membrane . . 117 



Offices of this sense in Man and other animals 118119 



Of this sense in Fishes and in vertebral animals 119 



2. Of Tasting. Organ of Taste. Manner in which the sensation is 



produced ISO 



Offices of this sense, and varieties of it 120121 



3. Qf Hearing. Organ of Hearing. Medium of sound. Reflection 



and velocity of sound 122 194 



Modifications of sound. Offices of this sense. Language 123135 



4. Of Touch. Feeling universally diffused. Touch confined to par- 



ticular parts 135126 



Organs of Touch. Offices of this sense. Effects of habit upon it 126 123 



5. Of Seeing-. Structure of the eye 128129 



Of light, and the manner in which it produces vision 129 



Of some inexplicable phenomena of vision 130 138 



Of the distances of objects as determined by the eye 132131 



CHAPTER V. 



OF INFANCY. 



Of Infancy in the human species 134135 



Modes of managing Infants among different nations 135 136 



Proper management of Infants 136 138 



Of Infancy in Quadrupeds ...* 140 



In Birds, Fishes, Insects, &c 140141 



CHAPTER VI. 



OP THE GROWTH AND FOOD OF ANIMALS. 



Of the mode in which the nutrition of animals is effected 141 141 



Of the food of man customs of different nations. Nature of man in 



respect to food 14& 144 



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