Minnesota Plant Life. 



529 



Azolla (see floating-fern), 



168,443, 515, 516 



Bachelor's-button, 413 

 Bacillus, 102 

 Bacteria, 29, 101, 424, 446, 459, 492 

 Causes of disease, 104 

 Classification, 101, 102 

 clover root, 117 

 Color producing, 102, 115 

 Consumption, 106, 108 

 Crop-rotation, 118 

 Dairy, in 

 Deep water, 453 

 Disease-producing, 102, 103, 105 

 diseases, 109, 453 

 Energy produced by, 104 

 Ferment-producing, 453 

 Fertilizers of the soil, 104 

 Cheese, in 

 Heat-producing, 115 

 Infection of eggs, 113 

 Interest to the human race, 104 

 Iron, 120 

 Light-producing, 115 

 Milk-curdling, 114 

 Milk-souring, 113 

 Mineral springs, 120 

 Nitrifying, 102, 117 

 Nitrogen, 117 

 Nodules of alders, 119 

 Nodules of alfalfa, 118 

 Nodules of beans, 118 

 Nodules of vetches, 118 

 Number of in Minnesota, 27 

 Nutrition, 103 

 Nutrition of purple, 116 

 Parasitic, 453 

 Producing acetic acid, 114 

 Producing alcohol, 102 

 Producing lactic acid, 113 

 Pitcher-plant, 279 

 Purple, 116 

 Putrefaction, 102, 109 

 Red, 115 

 Relations of to man, 120 

 Retting, in 

 Root-tubercle, 119 

 Smallpox, 106 

 Sources of ferments, 104 

 Substances formed by, 103 

 Substances and forces harm- 

 ful to, 104 

 Sulphur, 120, 453 



Bacteria 



Tanning, in 

 Tobacco-curing (see preface), in 



Typhus, 106 



Urine, 119 



Vinegar, 114 



Waste products of, 103 



Water, 443 



Bacterial phosphorescence, 104 



Purple, 104 



Bailey's dogwood, 341 



Ball-tossing puff-ball, 70 



Ejection of spores, 71 



Balm of Gilead, 238, 239 



Balsam (see Fir), 186, 192 



Balsam thicket, 472 



wood, 352 



-apple, 396 



-poplar, 238, 239 



Witches'-broom, 54 



Banana, 228 



Fruit, 423 



Baneberry, 268, 269 



Bar plants (Half-tone, 449), 447,451 



Barberry, 264, 274 



Wheat rust, 50 



Bark-moss, 149 



Bark of trees, 234 



Barley, 205 



Barnyard grass, 205 



Barrel-hoops, 244 



Barrens, 469 



Barrens, Jack-pine, 470 



Oak, 470, 478 



Basil, 375, 377 

 Bass-weed, 13, 38, 448, 451, 521 

 Bass-weeds, Lime-encrusting, 38 



Propagative bulbils of, 38 

 Basswood, 252, 321, 423, 462, 478 



Galls, 504 



Basswood, European, 323 



Half-tone, 324 



Bast, 497 



Bay, 275 



Bayberry, 243 



Beach, 469 

 Beach vegetation (Half-tone), 241 



Beach heather, 327 



peas, 304 



Beaked hazelnut, 246 



Bean, 280, 418, 503 



Bacterial nodules on, 118 



