354 



INDEX 



Soil, chemistry, 264. 



handling, 299. 



origin, 277. 



physical properties, 280. 



test for acid, 269. 



test for alkali, 270. 



test for salt, 270. 

 Sparrow, 122. 

 Sperm, 340. 

 Sporangia, 344. 

 Spores, 332, 340. 

 Sporophylls, 344. 

 Sporophyte, 342. 

 Spring work, 83, 86, 90, 93, 

 97, 100, 103, 105, 118, 

 120. 

 Stamens, 346. 

 Stigma, 347. 

 Strobilus, 344. 

 Style, 347. 

 Sweet pea, 120. 



Teachers, 29. 



misconceptions, 320. 



training, 5. 

 Tentacles of inquiry, 19. 

 Terminology, 33. 

 Third-grade work, 87, 115, 



118, 120, 122. 

 Tillage, 299. 

 Toadstools, 224. 



Tomato, 118. 



worm, 124. 

 Transpiration, 294. 

 Trees, 87, 88, 91, 92, 94, 95, 

 97, 99, 101, 109. 



suggestions for study, 162. 

 Truth, 68. 



Use and disuse, 334. 



Vacation experiments, 253. 

 Vascular system, 343. 

 Vegetative multiplication, 339. 



Water, absorption, 290. 



ascent, 293. 



life, 197. 



loss, 294. 

 Water beetles, 136. 

 Weather, 102. 



record, 182. 



study, 181. 

 Weeds, list, 180. 



plan for study, 177. 

 Wild flowers, study, 191. 

 Winter work, 83, 86, 89, 93, 



97, 100, 103, 105. 

 Worms, tomato, 124. 



currant, 129. 



gooseberry, 129. 



white grub, 220. 



(l) 



