INDEX 



(Illustrations are indicated by page numerals in bold-faced type.) 



Absorption, definition, 270 ; 



of digested foods, 308, 309. 

 Accommodation of eye, 361. 

 Acetanilid, 295. 

 Action of the heart, 319. 

 Adaptations, 24; 



in bee, 36; 



in birds, 189; 



in fish, 232 ; 



in frog, 241 ; 



in mammalia, 192. 

 Adenoids, 340, 395. 

 Adulteration in foods, 288. 

 Air, and bacteria, 145 ; 



composition of, 20 ; 



fresh, 337 ; 



needed in germination, 66 ; 



necessary in starch making, 91 ; 



passages in lungs, 330 ; 



use to plants and animals, 21. 

 Albumin, 62. 

 Alcohol, a food, 289 ; 



a poison, 291. 



and ability to resist disease, 363 ; 



and ability to work, 368 ; 



and body heat, 345 ; 



and crime, 371, 372; 



and digestion, 311 ; 



and duration of life, 370 ; 



and efficiency, 369 ; 



and heredity, 372 ; 



and intellectual ability, 364; 



and kidneys, 346 ; 



and living matter, 291 ; 



and memory, 365 ; 



and mental ability, 366; 



and nervous system, 362 ; 



and organs of special sense, 362 ; 



and pauperism, 371 ; 



and resistance, 327 ; 



Alcohol, and respiration, 346 ; 



and the blood, 327 ; 



and treatment of disease, 364 ; 



effect on circulation, 327 ; 



effect on eye, 361 ; 



effect on liver, 312 ; 



produces poisons, 347. 

 Algae, 176. 

 Alfalfa plant, 151. 

 Alimentary canal, 297. 

 Alkali, 306. 

 Alkalinity, 298. 

 Alligator, 230. 

 Ambergris, 205. 

 Ammonium hydrate, 61. 

 Amoeba, 170, 182, 332. 

 Amphibia, 186, 187 ; 



as food, 202. 

 Anal fin of fish, 233. 

 Angiosperms, 176. 

 Animals, as disease carriers, 227 



breeding of, 259 ; 



domesticated, 260; 



functions of ,48, 180; 



need plants, 34 ; 



oils of, 205 ; 



parasitic, 227 ; 



series, 182 ; 



that prey upon man, 230 ; 



use to man, 17 ; 



use to plants, 34. 

 Annual rings, 98. 

 Anopheles, 217, 218. 

 Anosia plexippus, 32. 

 Anther, 36. 



Antibodies, uses of, 316. 

 Antiseptics, 157. 

 Antitoxin, 157, 391. 

 Anura, 188. 

 Anvil, 369. 



419 



