INDEX 



375 



Peac-tree borer, 155 



Pec in, 60 



Peeper, 310 



Pel agra, 113, 251 



Pei nyroyal, 128 



Pec uies, 86 



Pepper bush, 86 



Peppergrass, 70, 71 



Perch, 306 



Perennial crowns, 71 



Pe Litonitis, 234 



Periwinkle, 274 



Pheasants, 40 



PLenol, coefficient of, 249 



PI loxes, 86 



Phcebe, 47 ; food of, 25 



Phosphates, 223 



Phosphorus, 96, 98, 99, 100, 101; 

 used for poisoning rats, 181 



Pickerel frog, 315, 316, 319 



Pied-billed grebe, 38 



Pig, 261 ; as host for trichina worm, 

 267 ; itch mites of, 166 ; tapeworm 

 of, 263 



Figeon, 35, 36, 42 ; killed by rats, 

 174; kinds of : band-tailed pigeon, 

 43 ; passenger pigeon, 43 ; red- 

 billed pigeon, 43 ; Viosca's pigeon, 

 43 



1 Mgeon grass, 70 



Pigeon hawk, 45 



Pigweed, 69, 70 



Pimples, 248 



Pine, 59, 83, 84 ; white pine, study 

 of, 4, 5, 6 



Pintail, 39 



Pinworm, 266 



Piroplasmas, 257, 258 



Pitch pine, 59 



Plague, 236 



Plankton, 219 



Plant food, essential elements of, 99 ; 

 losses in, due to cropping, 102 



Plant lice, 153, 156, 164 ; fecundity 



of, 18 

 Plant problems, 67-76 ; conservation 



of native plants, 67 

 Plantain, 71 

 Plover, 40 

 Plum, 165 



Plymouth Rock, 104 

 Pneumococcus, 234 

 Pneumonia, 121, 184, 232-236, 248, 



250, 251 

 Poison ash, 75 

 Poison elder, 75 

 Poison hemlock, 72, 75 

 Poison ivy, 74, 75 

 Poison laurel, 75 

 Poison oak, 74, 75 

 Poison root, 75 

 Poison snakeweed, 75 

 Poison sumac, 74, 75 

 Poisonous plants, damage from, 73 ; 



list of, 75, 76 



Poisonous snakes, 110, 327-329 

 Pokeroot, 76 

 Pokeweed, 75 

 Poliomyelitis, 122 

 Ponds, as balanced aquaria, 304 ; 



possible production from, 307 

 Poplar, 165 

 Porpoises, 169 

 Potash, 102, 223 

 Potassium, 96, 98, 99, 100, 101 

 Potato, 93, 97 ; blight or scab of, 



210, 215 



Potato beetles, 42, 153 

 Poultry, 103, 104 

 Poultry mite, 167 

 Pout, 306 



Prairie chicken, 53 

 Prawns, 287 

 Proteans, 313 

 Protein, 187, 189 

 Protozoa, 255, 256 



