IXDEX 



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 substanfe from soil, 150. 



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

 287, 317, 388. 390. 



— phospborus 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. 111-114. 



wood, 68. 



affected by dissolved substances, 



18, 124, 217. 336. 



force required for. 121-123.* 124. 



A<-;if:ia, 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. 

 boracie, 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 soU, 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 formatioi' 



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. 



Aconitum. See Monkshood. 



Adaptation, 326-361. 



.^cidiospores, 403.* 



Aerotropism, 89, 98, 135. 293. 



.^sculus. 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) 



