INDEX. 
249 
Limej carbonate of, petrifying, 
120. 
Limpet clinging to a rock, 65. 
Liquid, definition of a, 15. 
Lines in flowers, 227. 
Llanberis Pass, 127. 
Looking-glass, cause of reflection 
in, 44. 
Lotus corniculatus, 235. 
Lubbock, Sir J., cited, 223, 234. 
Lycopodium like coal-plants, 182. 
MAGNETS, attraction and repul- 
sion of, 91. 
Martineau, Miss C., on echoes, 
139- 
Mediterranean, vapour carried up 
from, 82. 
Mercury, action of, in a barometer, 
68. 
Metal reflecting light, 44. 
Meteors, height of atmosphere 
shown by, 63. 
Mississippi delta, 119. 
Moraines, 125. 
Mountains causing rainfall, 83. 
Mouse breathing in bell-jar, 57. 
Mud in river-water, 112. 
Musical notes, 144, 145-147. 
NASTURTIUM and the bee, 229. 
Nature and her laws, 24. 
love of, 19. 
Neath Colliery, fossils from, 178. 
Newton on light, 34. 
Nile plain and delta, 119. 
Nitre crystals, how to make, 90. 
Nitrogen in air, 56. 
Nodules in coal, 180. 
Noise and music, 145. 
Norfolk, Virginia, Dismal Swamp 
in, 186. 
Notes of music, 146. 
OIL, its heat and light, 47. 
wells, 192. 
Oils in coal, 190, 191. 
in plants, 157, 163, 192. 
Orange-cells, 158. 
Orchis mascula, its structure, 237. 
Otoliths, or ear-stones, 143. 
Ovules of plants, 166. 
Oxygen in air, 56. 
PAN-PIPES, 150. 
Paper, pressure of air on square 
inch of, 64. 
Paraffin from coal, 192. 
I Peat, formation of, 187. 
I Petrifactions, 120. 
Pelargoniums, 229. 
Pennine Hills causing rainfall, 
84. 
Peter Bell on a primrose, 7. 
Phosphoric acid, 56. 
Phosphorus burning in air, 56. 
Photography, 48. 
Pimpernel, closing for rain, 225. 
Plant-cells, 158. 
Plant, food of a, 159. 
water rising in a, 160. 
Plants absorbing rain, 84, 
annual and perennial, 165. 
contrivances for protection 
in, 226. 
effect of light on, 45. 
fertilized by wind, 222. 
in a coal-mine, 177. 
