INDEX 



Asterisk (*) denotes illustrations 



Abnormality, 420, 421, 449.* 



Absorption, due to osmosis, 17, 60, 63, 64, 



67, 122-124. 

 of ammonia by soil, 145, 147. 



carbon dioxide, 191,* 192,* 194, 195, 200, 



202. 



- endosperm, 57,* 179, 180.* 



light by leaf, 196, 201. 



nitrogen by plants, 147, 149, 383, 



384. 

 soil, 145, 147-150, 383, 384. 



organic substance from soil, 150. 



- oxygen, 33, 34,* 35, 175, 194, 195, 200, 



287, 317, 388, 390. 



phosphorus by soil, 145. 



potash by soil, 145. 



salts by plant, 136, 137, 161. 



- stored food, 57.* 164, 179, 180,* 183, 



260, 287, 313. 



- water by root, 88, 102, 103, 119,* 120*- 



123.* 



affected by temperature, 332. 

 seeds, 6,* 7,* 8,* 9*-15,* 16-19,* 



20,* 21,* 22,* 23,* 26,* 27.* 



soil, lll-lU. 



wood, 68. 



affected by dissolved substances, 



18, 124, 217, 336. 



force required for, 121-123,* 124. 



Acacia, protection of, against drying, 217. 



seeds of, boiling to hasten germination, 

 25. 



sleep position of leaf of, 218.* 



wood of, 230. 



Acanthus, protection of pollen by, 294. 

 Acid, excreted by roots, 141-143,* 144, 145. 



in fruits, 315. 



- soil, 141, 143, 145, 146. 



Acid, acetic, manufacture of, 387. 

 boracic, as preservative, 380. 

 carbonic, as plant-food, 139. 



as solvent of plant-food, 139-145. 



given off by root, 141, 142, 143,* 144. 



source of, in soil, 141. 



See, also, Carbon Dioxide, 

 carbolic, as disinfectant, 364. 

 fatty, 171. 



hydrochloric, 155, 157. 

 lactic, 378-379. 



nitric, as plant-food, 139, 140.* 



for isolating wood cells, 235. 



test for proteids, 165. 



oxalic, a by-product in proteid formation 



254. 



phosphoric, as plant-food, 139, 140.* 

 salicylic, as preservative, 386. 

 sulphuric, as plant-food, 139, 140. 



in manufacture of superphosphates, 



150. 



as test for formalin, 377. 

 proteids, 166, 178. 



Acer. See Maple. 



Acouitum. See Monkshood. 



Adaptation, 326-361. 



^Ecidiospores, 403.* 



Aerotropism, 89, 98, 135, 293. 



./Escnlus. See Buckeye and Horse Chest 



nut. 

 Estivation, protection against drying by 



213. 



Agave. See Century Plant. 

 Ailanthus, leaf scar of, 212. 

 Air affects direction of growth of pollen - 



tube, 293. 

 affects direction of growth of root, 89, 



98, 135. 



(455) 



