222 



INDEX 



Molar teeth, A. B., 188; H. B., 



86. 

 Mold, 



bread, P. B., 149-151, Fig. 75. 



vegetable, P. B., 111. 

 Mollusca, A. B., 181-185. 

 Molting, 



of caterpillar, A. B., 12. 



of crayfish, A. B., 159. 



of grasshopper, A. B., 29. 



of mosquito, A. B., 43. 

 Monocotyledons, P. B., 159, 160, 170. 

 Moran, John, A. B., 52, 54. 

 Mosquitoes, A. B., 43-56. 



as a means of transmitting malaria, 

 A. B., 48. 



as a means of transmitting yellow 



fever, A. B., 50. 

 Mosses, P. B., 164-166, Fig. 84. 



moss plant, P. B., 164. 



protonema, P. B., 164. 

 Moths, characteristics of, A. B., 13. 

 Mouth, absorption in, H. B., 99. 

 Mouth cavity and its function, H. B., 



84-92, Fig. 27. 

 Muscles, 



of bird's wing, A. B., 66. 



of man, H. B., 150-154. 

 Muscular energy, A. B., 127, 158; 



H. B., 123. 



Mushrooms, P. B., 151, Fig. 76. 

 Mussel, A. B., 181-184. 



Nails, care of, H. B., 142. 

 Narcotics, definition, H. B., 64. 

 Nearsightedness, H, B., 164. 

 Necessity for foods, H. B., 45. 

 Neck of tooth, H. B., 89, Fig. 30. 

 Nectar, P. B., 80. 

 Necturus, A. B., Fig. 89. 

 Nerve centers, H. B., 155. 

 Nerve fibers, H. B., 155. 

 Nerve impulses, H. B., 157. 

 Nervous energy, H. B., 123 

 Nervous system, H. B., 154-162. 

 Nests 



of birds, A. B., 72, Fig. 73. 



of stickleback, A. B., Fig. 104. 

 Net, insect, A. B., 1. 



Nettling cells, A. B., 177. 



Newt, A. B., 118, 



Nitric acid, test for protein, P. B., 18. 



Nitrogen, P. B., 11. 



Nose cavity, H. B., 125, Fig. 39. 



Nostrils, 



of bird, A. B., 62. 



of fish, A. B., 136. 



of frog, A. B., 101. 

 Notebooks in biology, H. B., 181- 



187. 

 Nucleus, P. B., 28, 29; H. B., 6, 



Fig. 4. 



Nutrients, H. B., 47, footnote. 

 Nutrition, 



in fungi, P. B., 150. 



in green plants that produce seeds, 



P. B., 194. 

 Nutritive hyphse, P. B., 150. 



organs of plants, P. B., 39. 



Oak, 



leaves, P. B., Fig. 20, C, G. 



tree, amount of evaporation from, 

 P. B., 136. 



wood, P. B., 46. 

 Oil glands, H. B., 140. 

 Opium, P. B., 129. 

 Opposite arrangement, P. B., 52. 

 Orange crop, P. B., 120-122. 

 Order of topics, H. B., 178-180. 

 Organ, definition, H. B., 2; A. B., 



173. 

 Organs, 



nutritive, P. B., 39. 



of a plant, P. B., 27. 



of circulation, H. B., 108-118. 



of digestion, H. B., 82-98. 



of human body, H. B., 1. 



of respiration, H. B., 125-132. 

 Osmosis, P. B., 32-38. 



definition and applications, P. B. 

 35. 



in living cells, P. B., 34. 



in root-hairs, P. B., 44. 



of grape sugar, P. B., 33. 



of starch, P. B., 35. 



protein, P. B., 37. 



water, P. B., 33. 



