INDEX 



115 



Guinea pig, 95, 105 

 Guyer, 106 



Hair, 59 

 Harebell, 101 

 Hay fever, 75, 76 

 Heat, 38, 55, 66 

 Heavy metals, 66 

 Hemoglobin, 62 

 Herrmann, 95 

 Hormones, 52, 94, 95, 



96 

 Hydrogen, 3, 62, 63, 70 

 Hydrogen peroxide, 61 

 Hypophysis, 93 



Imbibition, 13, 15, 16, 

 20 



Imitations of life phenom- 

 ena, 21, 89 



Immunity, 75 



Indian Pipe, 58 



Injury, 81, 82, 83, 86 



Injury, current of death, 

 85 



Intelligence, 41 



Iodine, 92 



Iron, 53, 58 



Irritability, 67 



Irwin, 79 



Jelly fish, 64 

 Kidney bean, 11 



Leaf, 47, 48, 59 



Light, 38, 40, 48, 61, 100, 



101 

 Lime, 51, 52, 83, 84, 105 

 Loeb, 27, 40, 97, 102 

 Lucretius, 4 



Luminescent animals, 61 

 Lungs, 62 



Manganese, 62 

 Marchal, 97 

 McClendon, 96 

 Membrane, 14, 16, 17, 18, 



77, 78 

 Mermaid Weed, 100 

 Methylene blue, 63 

 Mice, 104 



Mineral substances, 52 

 Morgan, 109 

 Motion, 29ff. 

 Muscle, 31, 64 

 Mutations, 109, 110 



Natural selection, 44 

 Nerve cell, 10, 28 

 Nitrogen, 50, 51, 53 

 Nuclear division, 10, 25, 



28, 29 

 Nucleus, 58, 83 



Organic acids, 18 

 Osmosis, 13, 15, 16, 20 

 Ovaries, 93, 94 

 Oxidation, 58, 60, 61 



