244 



THE MECHANISM OF LIFE 



Growth, directive. 135; movements, 9; 



organic, 171; orientation of, 9 

 Guano, origin of, 80 



Habits, 179; variable, 173 



Haemoglobin of blood, 69 



Hallucinations, 179; and energy, 52 



Hand, articulation of, 18 



Harmony of activities, 6 



Harvey and circulation of blood, 66, 154 



Head, structure of, 94 



Heat of body, 70; economy of, 150; 

 engines, 69; and entropy,' 201; flow 

 of , 43 ; a form of energy, 3 1 ; measure- 

 ment of, 37 ; mechanical equivalent 

 of, 43 



Hearing analysed, 174; organ of, 114 



Heart-beat, regulation of, 88 



Heart of vertebrates, 2; action of, 65; 

 inhibition of, 142; innate heat of, 

 154; muscles of, 22 



Heliotropism, 135, 183 



Hemiplegia in man, 137 



Hemispheres, cerebral, 98; connections 

 of, 102; functions of, 125; removal 

 of, effects, 139 



Herbivorous animals, 84 



Herd instinct, 142 



Heredity, not explained, 193; what is 

 transmitted, 225 



Hibernation, 150 



Horse-power, 37, 44 



Hunger, 6 



Hydraulics of body, 156 



Idealism, 176 



Immortality, physical, 208 



Inanimate engine, 55 



Inco-ordination, 6 



Indeterminism, 222 



Indeterminism of response, 138; 



evolution of, 139 

 Individualism, 142 

 Inertia and mass, 35 

 Inevitability of response, 137 

 Infusoria, 9, 11 

 Inhibition, 119, 141; of conduct, 143; 



of heart, 142 ; and shock, 142 

 Insanity and herd instinct, 142 

 Insects, locomotion of, 11 

 Instinct, herd, 142 

 Integration of activities, 4, 88; of 



functioning, 74 

 Intelligence and adaptations, 151; 



and spontaneity, 144 

 Intensity factors of energy, 50 

 Intestine, muscles of, 22 

 Intuition not communicated, 225; 



not conserved, 224 

 Irrevereibility, physical, 195 

 Irritability, 69; the basis of sensation, 



106 

 Isolated systems, 45 



Joints, ball-and-socket, 21 ; and de- 

 grees of freedom, 19; elbow and 

 knee, 20; Joule and theory of heat, 

 42, 158, 194; and ligaments, 20 



Kant and a priori ideas, 54, 186; and 

 space and time, 188 



Kelvin and mechanism, 4, 194 



Kidney, diagram of, 72, 73, 76; func- 

 tioning of, 6 



Kinetic energy, 39, 47; and vis viva, 

 154 



Knowledge, elements of, 230; theory 

 of, 186 



Labyrinth, auditory, 114 



Lavoisier, 157 



Law of conservation and intuition, 

 224; qualifications of, 52 



Laws, scientific, 170; of thermody- 

 namics, 54 



Legal inhibitions, 143 



Lemniscus tracts, 100, 111 



Levers in the skeleton, 20 



Life, balance of, 84; concept of, 221 ; 

 continuity of, 233; degradation to 

 materiality, 226; duration of, 207; 

 energy, cycle of, 57; and energy, 2 14; 

 improbability of, 209; and indeter- 

 minism, 213; intuition, 223; mani- 

 festations of, 225; passage into 

 material, 233; physical nature of, 

 210; and senile decay, 225; sub- 

 stance, 233; tendencies of, 216 



Light and plant growth, 82, 135 



Limb appendages, 18 



Limb girdles. 17 



Limbs, modifications of, 17; skeleton 

 of, 17 



Liver of vertebrates, 03, 04 



Locomotion in animals, 11; and cere- 

 bellum, 125; ciliary, 11 ; in Crustacea, 

 2; in earth worm, *1 5; in jelly-fishes, 

 15; in molluscs, 15; in starfishes, 2; 

 in vertebrates, 2, 17; in water, 11 



Lodge and matter, 162; and waves, 

 168 



Loeb, 159; and consciousness, 184 



Lungs in man, 65; structure, 67; 

 in vertebrates, 2 



Lymphatic vessels, 61 



Magnitude, orders of, 205 



Malpighi, 66 



Mass, nature of, 34 



Materialism, 226 



Materiality, 31; analysis of, 227; and 



energy, 37 

 Matter, conservation of , .")_' : Descartes' 



theory of, 161 ; and extension, 161; 



theory of, 36; universal, 36 

 Maxwell, J. C., and Descartes, 101; 



and gas theory, 199 



