INDEX 



vii 



Mycelium, P 107, 108, 188. 

 Mychorrhiza, P 108. 



Nails, H 19. 



Narcotic, H 137, 148. 



Nasal tone, H 144. 



Natural selection, P 8, A 148. 



Nautilus, chambered, A 107. 



Nectar, A 8, P 148. 



Nephridium, A 45. 



Nerve, H 119; spinal, H 127; cranial, 



H 127. 



Nerve cell, H 119; fatigue of, H 130. 

 Nerve center, H 117, 120. 

 Nerve fiber, H 119. 

 Nerve tissue, H n. 

 Nerves, vaso-motor, H 23. 

 Nervous children, H 135. 

 Nervous system, of bee, A 78; of man, 



H 117; of mussel, A 102. 

 Nest building, A 166, 182. 

 Neuron, H 118. 

 Neuroptera, A 82. 

 Neutral substances, ix. 

 Nitella, P 187. 



Nitric acid test for proteid, xi. 

 Nitrogen, viii, P 39, 40, H 81. 

 Nitrogenous compounds, xi. 

 Nodes, P 20, 52. 

 Nodules, P 39, 40. 

 Nose bleed, H 52. 

 Nostoc, P 184. 



Nostril, of bird, A 151; of fish, A 112. 

 Notebooks, P 3. 

 Nucleolus, A 6, H 6. 

 Nucleoplasm, H 7. 

 Nucleus, P 144, 185, A 6, n, 14, 



H 6, 18. 



Nutrients, H 91. 

 Nuts, P 164, H 95. 



Octopus, A 1 06. 

 Oil gland, H 20. 

 Oils, test for, xi. 

 Okapi, A 214. 

 Oleander, p 86. 

 Omnivorous, A 47, H in. 

 One-celled animals, A 7. 

 Oogonia, p 186. 

 Opossum, A 197; H 4. 

 Opsonin, H 162. 

 Optic nerve, H 151, 152. 

 Oral surface, A 35. 

 Orang, A 227. 

 Orbit, H 149. 

 Orchid, p 35, no. 



Order, A 9. 



Organ, A i, H 9. 



Organic, xiv, A i. 



Organism, A i. 



Orthoptera, A 82. 



Oscillatoria, P 184. 



Osculum, A 1 8. 



Osier, Dr. William, quoted, H 133. 



Osmosis, P 42, 48. 



Outdoor life, H 5, 22. 



Ovary, p 135, 144, 163, 170, A 25 



37, ii7- 



Overgrowth, p 12. 

 Oviduct, A 46. 

 Ovule, P 144, 1 86. 

 Oxidation, xii, A 3, 4, 5, H 14, 90, 



91, 120. 



Oxygen, viii, A 4, 5, H 4, 76, 81, 140. 

 Oyster, A 104. 



Palisade cells, P 86. 



Palmate, p 74. 



Pancreas, H 104. 



Panicle, P 158. 



Papilla, H 17. 



Pappus, P 141. 



P aramecium, -^i^/ 



Parasites, P 107, A 49, 93. 



Parenchyma, p 60, 86. 



Partridge, A 178. 



Pearls, A 105. 



Peccary, A 217. 



Pedicel, p 162. 



Peduncle, p 62. 



Peltate, P 77. 



Pelvis, H 33. 



Pepsin, H 103. 



Perch, A 109, no, 123. 



Perennial, P 17. 



Pericarp, p 164, 165, 169. 



Peristalsis, H 102, 106, 127. 



Peritoneum, H 106. 



Pests, insect, A 93. 



Petals, P 134. 



Petiole, P 76 



Phagocyte, H 161. 



Pharynx, H 73, 85, 101. 



Pheasant, A 174. 



Phenogam, p 177, 180. 



Phosphorus, vi. 



Photo-synthesis, P 94, 101. 



Phyllotaxy, P 84. 



Physics, xiv. 



Physiology, H 9. 



Pigment, H 18. 



Pine cone, P 27, 170. 



