INDEX 
References 
Public baths. . 517 
institutions, examination of 
servants for.501 
Public markets.426 
museums.122 
parks.517 
preserves.. 124 
Puffball, example of fungi . . 9 
spores of, “ smoke ” ... 328 
Puffins, nest of.112 
Pulmonary tuberculosis, dis¬ 
cussed .489 
Pulse caused by beating of 
heart.454 
Pulse, members of bean family 299 
Pulse family.376 
discussed.299 
foods furnished by . . 222, 228 
list of plants of.299 
value to the soil of plants of . 256 
Pulvinus.291 
Pupa, stage in the metamor¬ 
phosis of insects .... 27 
description of.27 
Pupil of eye.473 
Pure culture, defined .... 316 
of nitrogen-gathering bac¬ 
teria .259 
of yeast plant.321 
Pure food laws.428 
Pure milk, cost of producing . 314 
Purpose of respiration 446 
Purslane, a weed.239 
Pustules on wheat stems 385, 386 
Pyloric valve of stomach . . . 408 
Python, a constrictor .... 102 
Q 
Quack, defined.501 
Quack grass.261 
Quail, a seed eater . . . 117 
food of.35, 36 
Qualifications of a forester . . 361 
Quality of work a test 477 
Quarantine against insects . 522 
defined.308 
laws.509 
regulations.508 
violation of.508 
Quarter-sawn timber .... 354 
Queen bee.46 
29 
are to pages 
R 
Rabbits, destroyed by hawks . 115 
harmful animals.134 
Raceme.214 
Radial arrangement of starfish 169 
Radish, a dicotyledon . . . 227 
member of mustard family . 298 
storage of food in roots of . 253 
Range of plant’s territory, how 
increased.240 
Rank-scented foliage of night¬ 
shade family.301 
Raphe of beans.227 
Raptores, discussed . . . . Ill 
Raspberry, in plant succession . 375 
example of aggregate fruit . 239 
produced by rose family . . 298 
Rats, destroyed by hawks . 115 
harmful animals.135 
Rattlesnake, a poisonous snake 101 
fangs of.101 
poison, effect of.488 
Raw materials of photosynthesis 279 
Raw milk, danger from . . . 315 
Ray flowers of composites 206 
Rays of starfish.169 
Receptacle, part of flowers 201, 233 
Reclamation of land .... 391 
by draining.392 
Reclamation projects .... 392 
Rectum, part of digestive 
system. 404, 409 
Recovery from fatigue of 
muscles.439 
Redbud, member of pulse 
family.299 
Red corpuscles of blood . . . 449 
Red rust of wheat, a fungus 324 
Red-shouldered hawk . 115 
Red squirrels, harmful animals 135 
Redwood trees, age of . . . 261 
Reflex action, discussed . . . 469 
in the earthworm .... 471 
in the frog.471 
in the hydra.471 
Reforestation.356 
Refrigeration of foods . . . 497 
Regeneration, defined . . 174 
Regular flowers, defined . . • 204 
of mustard family .... 298 
