INDEX 
31 
References 
Ripened ovary, the fruit of a 
plant.233 
Roadsters or trotting horses 129 
Robber bees.47 
Robin, a useful bird . . . 114 
food of.115 
sometimes a permanent resi¬ 
dent .113 
Rochelle salts in Fehling’s solu¬ 
tion .228 
Rock oil, formation of 340 
Rocks, habitat of lichens . . 325 
habitat of pleurococcus . . 304 
Rod-shaped bacteria .... 309 
Root, the.247 
Rootcap.247 
Root hairs, discussed .... 248 
Roots, of alfalfa.252 
of beet.255 
of pine.343 
Root system of alfalfa . . . 252 
of wheat plant.252 
Rose, a common plant family . 298 
leaves of.298 
family, discussed .... 298 
foods furnished by . . . . 376 
Rose-breasted grosbeak, de¬ 
stroyer of potato beetles . 36 
Rosette formation of leaves 289 
Rosette of moss plant 329 
Rotating crops, reason for 257, 394 
Rough lumber.363 
Round clams.192 
Round leaves of sundew . . 367 
Rudimentary toes of cow . . 126 
Rules of hygiene.317 
Runners (stolons).271 
Rushes related to ferns . . 333 
Russian thistle.242 
Rye, a cereal.244 
a monocotyledon .... 227 
member of grass family . . 295 
S 
Saddle horses . 129 
Saffron, flowers of . 217 
Sage, a member of the mint 
family.300 
Sailing birds, examples of . . 108 
wings of . 108 
are to pages 
Salamander, classified ... 9 
discussed.82 
Saliva, use of, in man .... 411 
of mosquito.494 
Salivary glands, of man, loca¬ 
tion of.409 
of mosquito.494 
Salmon, example of bony fish . 71 
in hatcheries.78 
Salt, a fundamental taste . . 405 
common, scientific name of . 412 
use of, in preserving meat . 313 
Salt-rising bread.427 
Salts in food.15 
Samara.237 
Sand swallow, nest of ... 112 
Sand worm.184 
Sanitary measures.498 
nuisances.519 
officers.519 
Sanitation, effect of in prevent¬ 
ing disease.497 
San Jose scale, an injurious 
insect.34 
Sap, compared with blood . 269 
conducted by vascular 
bundles.281 
Saprophytes, group of fungi 321 
Sapwood.353 
Sardines, example of bony fish . 71 
Savory, member of mint family 300 
Sawdust, adulterant .... 428 
Scale insects, spray for ... 32 
Scale-like leaves of cedar 345 
Scales, of fish.72 
modifications of skin . . . 459 
Scales of staminate cone of pine 343 
Scallops, edible mollusks . 193 
Scarlet fever, probable cause of 489 
Scars, characteristic of stem . 264 
Scholarship, effect of smoking 
tobacco, on.485 
Scientific interest in plants . 377 
Scion.271 
Sclerotic coat of eye .... 473 
Scorpions, example of Araeh- 
nida.65 
Scouring rush.339 
Screech owl, a useful bird . . 115 
Scrub stock improved by graft¬ 
ing .271 
