INDEX 



[An * after the page number signifies an illustration.] 



Acacia, 3, 117, 199. 



Acid, carbonic, 25. 



Acids from roots, 58. 



Adam's apple, 361. 



Adobe, 28, 130. 



Africa, 329. 



Air, bacteria in, 256 ; need of, 2, 6, 17, 



74, 1 14 ; enters leaf by stomata, 



75, 76 ; in soil, 6. 

 Air food, 85. 

 Alaska, 18, 277. 

 Alberta, 163. 

 Albumin, 352. 

 Alcoholic drinks, 359. 



Alfalfa, 69, 122, 126, 138, 241, 285, 

 398 ; irrigation of, 52* ; as bee pas- 

 ture, 409. 



Alfalfa butterfly, 185*. 



Alfileria, 170, 171, 172*, 173*, 174*. 



Alfilerilla, 170, 171, 172*, 173*, 174*. 



Algeria, 288. 



Alkali, 249. 



Alkali grass, 138, 284. 



Alkali soils, 131, 132*, 133, 134*, 

 135*, 136*, 138. 



Alkali water, 135, 137. 



Alluvial soils, 21. 



Almond, 302, 314. 



Almond root rot, 248. 



Almond rust, 241. 



Aloes, 23. 



Altona, 259*. 



Ammonia copper carbonate, 413. 



Anaheim disease, 249. 



Angora cat, 401. 



Angora goat, 391*. 



Animal, needs of, 346. 



Anise, 332. 



Ant, 199-200; Argentine, 202*. 



Ant cows, 199, 211. 



Anthers, 92. 



Antitoxins, 262. 



Aphids, 210-213, 221. 



Aphis, 221. 



Apple, 107, 243, 303* ; blight of, 243 ; 



mildew of, 235; root rot of, 248; 



scab of, 246-247*. 

 Apple flower, 94*. 

 Apple-leaf aphis, 212*. 

 Apple root rot, 248. 

 Apricot, 47*, 110, 302; brown rot of, 



234 ; shot-hole fungus of, 241. 

 Apricot scale, 216. 

 Aquarium, 85. 

 Arabian horse, 379*. 

 Arbor vitae, 340. 

 Arcadia, 24. 

 Argentine ant, 202.* 

 Arid regions, 29, 32, 127. 

 Arid soils, 30, 59. 



Arizona, 29, 30, 40*, 131, 146, 309. 

 Arm, 371*. 



Army worms, 192, 193*, 194*. 

 Aromatic plants, 332. 

 Arsenate of lead, 183, 184, 210, 412. 

 Arsenic, 203. 

 Arsenical spray, 199. 

 Arsenic for poisoning weeds, 166. 

 Artery, 373. 

 Artesian water, 135. 

 Artesian well, 42, 43*. 

 Artichoke, 322. 

 Ash, volcanic, 22, 23. 

 Asia, 279, 306, 315, 324, 329. 

 Asparagus, 122, 138, 239*, 320; 



centiped of, 220*. 

 Asparagus rust, 239*, 240. 

 Ass, 383*. 



415 



