INDEX. 



351 



Scrophularia, 231. 

 Scrophulariaceae, 199. 

 Seal, 69. 

 Seasonal occupations, 9. 



studies, 15. 

 Seasons, 39. 

 Sections of leaf, 221. 

 Seed dispersal, 29, 43, 239. 

 Seedlings, 247. 

 Seeds, 20, 247. 

 Sepals, 28, 226. 

 Sheep's nostril fly, 310. 

 Shells, 3, 142, 336. 



,, , description of, 79. 

 Shepherd's Purse, 35, 198, 295. 

 Shrew, 141. 

 Skeleton of birds, 109. 

 Skin of toad, 83. 

 Sky, colour of, 57, 

 Skylark, 120. 

 Slate, 283. 

 Slugs, 304. 

 Snail, 63, 150, 304. 



, pond, 191. 

 Snakes' eggs, 92. 

 Snow crystals, 64. 

 Snowdrop, 25. 

 Soil, 45, 47. 



,, , animal inhabitants, 46. 

 Solen, 147. 

 Sorus, 274. 

 Sparrowhawk, 127. 

 Sparrows, 158. 

 Spawn, 12, 86, 329. 

 Specific gravity in fish, 72. 

 Spines, 30, 223. 

 Spiral shells, 148. 

 Sponges, 194. 

 Spongy tissue of leaf, 221. 

 Sporangium, 274. 

 Spores, 274, 280. 

 Spring awakenings, 16. 



flowers, 35, 197, 202. 

 Spruce fir, 268. 

 Squirrels, 141, 193. 

 Stable fly, 309. 

 Stamens, 28, 226. 

 Star studies, 45 49. 



Starfish, 62. 

 Starling, 117. 

 Stem, 18, 20, 207. 

 Stigma, 211. 

 Stipules, 201, 223, 2G6. 

 Stitchwort, 245. 

 Stoat, 137, 193. 

 Stomata, 221. 

 Stonefly, 181, 188, 332. 

 Storage organs, 26, 44. 

 Storing animals, 193. 

 Strawberry, barren. 203. 

 Struggle for existence, 32, 140, 



209. 



Style, 230, 237. 

 Summer visitors, 111. 

 Surface caterpillars, 302. 

 Surface film, 33, 191. 

 Swallow, 12, 122. 

 Swift, 12, 107, 124. 

 Sycamore, 26, 239, 241, 254, 264. 

 Symmetry in nature, 28, 59. 



Tadpoles, 33, 85, 87, 88, 89, 329. 



Teacher, 337. 



Teeth, 335. 



Tendrils, 30, 223. 



Tenelrio, 332. 



Testacella, 304. 



Thistles, 296. 



Thrush, song, 11, 116. 



Thumb-wing, 97, 102. 



Tiger moth, 165. 



Time-table, 16, 40 



Tipula, 312. 



Tit, 118. 



Toad, 80. 



Toadstool, 45, 279. 



Tongue of frog and toad, 83. 



Tortoiseshell butterfly, small, 159. 



Town, nature study in, 52. 



Transpiration, 25. 



Trees, 26, *36, 37, 250. 



Trichoptera, 181. 



Trout rearing, 332. 



Tuber, 44. 



Tulifex, 182. 



Turnip, 26. 



