214 



INDEX 



Fermentation, 94-95. 



Fire extinguisher, 91. 



Fires, 90-92 



Flame, 10-11. 



Flies, 26, 30. 



Food elements, 126, 135-137, 152- 



153. 



Food preservatives, 31, 94, 137. 

 Food supply, 84-86, 102-105, 125- 



126, 133-137, 151-153. 

 Forces, 38-40, 44-46. 

 Fruits, 146-147, 149. 

 Fulcrum, 162-163. 



Gardening, 86, 101-105. 

 Germination, 142-143. 

 Germs, 20-23. 

 Growth, 32, 37. 



H 



Habits, 34-35, 37. 



Hand, 1-3. 



Health, 19-37, 122-123. 



Heat equator, 61. 



Heat from the sun, 72-74. 



Heating plants, 83-84. 



Heavens, the, 193-197. 



Hen, the, 124-125. 



"Highs" and "lows," 60-62, 65-68 



Horizon, 181-182. 



Horse, the, 129-132. 



House, rooms of, 77-84. 



Images by reflection, 175-177. 



Incubators, 128. 



Inertia, 39. 



Infection, 20-29, 95. 



Irrigation, 65. 



Isobars, 65-68 



Isotherms, 65-68. 



Joints, 2. 



sundry, 83. 



eaves of plants, 106, 108, 112-114. 

 Covers, 162-163. 

 ,ife, 31-32. 

 jungs, 14-16 



M 



Machines, 160-162. 

 Magnets, 167-171. 

 Matter, 38-40. 



properties of, 38-42, 51-53. 

 Meat, 86, 133. 

 Milk, 134-137. 

 VIolecular motion, 45-48. 

 Molecules, 39. 

 Moon, the, 185-189. 

 Mosquitoes, 26, 30. 

 Mouth, 3-6. 

 Muscles, 1-5, 33-34. 



N 



Narcotics, 34-36. 



Occupations, 101-102, 116-119. 



for children, 101-102, 119. 

 Osmosis, 46-48. 

 Oxidation, 9-12, 17. 

 Oxygen, 9-14. 



P 



Parallels of latitude, 182, 184. 



Patent medicines, 36. 



Pendulum, 189-191. 



Perspiration, 17-18. 



Phases of the moon, 186-189. 



Planets, the, 174-175, 195-197. 



Plant studies, 105-114, 147-148. 



Plants, usefulness of, 157-159. 



Plumbing, 78. 



Poultry, 126-129. 



Properties of matter, 38-42, 52-53. 



Protein, 126, 153. 



Protoplasm, 31. 



Pulleys, 163-166. 



Pumps, 56-57. 



Pure foods, 26, 31. 



