INDEX 



Vll 



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, u, 14, 



H 6, 18. 



Nutrients, H 91. 

 Nuts, p 164, H 95. 



Octopus, A 106. 

 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, "7- 



Overgrowth, p 12. 

 Oviduct, A 46. 

 Ovule, p 144, 186. 

 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. 

 Paramecium, A 13. 

 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. 



