INDEX 



Acer, 306 



Acetic acid, a by-product, 290 

 Acid in oranges and lemons com- 

 pared, 204 

 Acreage under irrigation in United 



States, 144 

 Acre-foot, 149 



inch, 129 



Adulterated seed, 49 

 Adventitious bud, 27, 217 



denned, 59 

 Advertising of citrus fruits, exercise, 



205 



Africa explored for wild plants, 7 

 Alcohol, a by-product, 291 

 Alkali, 152 



indicated by certain plants, 120 

 Almond, 191-192 



blossoming period of, 192 



diseases of, 192 



Growers' Exchange, California, 

 192 



marketing of, 192 



pollination of, 192 



propagation of, 192 



statistics regarding, 191 

 Alternate bearing, 29 

 Ammonium sulfate, a by-product, 



290 



Ampelopsis, 302 



Anemophilous plants, denned, 165 

 Aniline, a by-product, 290 

 Annular budding, 76 

 Anther, illustrated, 158 



Anthracnose, 256 



on currant and gooseberry, 214 

 Ants and plant-lice, 239 

 Aphids, 225 



illustrated, 240 

 Apple, bitter-rot, illustrated, 257 



diseases of, 182 



geographical distribution of, 181 



insects injurious to, 182 



origin of, 180 



tree borer, study of, exercise, 

 244 



varieties of in America, 181 

 Approach-grafting, 81 

 Ann of grape, 217 

 Armored scale, control of, 238 



described, 237 

 Artesian wells, 148 

 Artichoke, Jerusalem, 95 

 Ascent of water in plant, 37 

 Asexual propagation, 69 

 Ash, dissemination of seed of, 44 

 Asphalt, a by-product, 290 

 Auction market, 280 

 Australian silk-oak, 305 

 Avocado, a semi-tropical fruit, 204 



B 

 Bacteria in vinegar manufacture, 



291 



Bacterium, 248-249 

 Balling saccharimeter for testing 



grapes, 263 

 test, exercise, 273 

 Barberry, 304 



311 



