804 



SCIENTIFIC SIDE-LIGHTS 



FLIGHT, Mystery of 2319 



, Power of, lost by disuse 2672 



a Seeming defiance of 



gravitation 2319 



, Wings used otherwise 



than for 70 



FLINT, Light from, and 



steel 1235 



, Origin of 1238 



FLINT IMPLEMENTS, De- 

 sign shown in 790 



, Human origin of, now 



unquestioned 789 



, Once attributed to acci- 

 dent 789 



in Shell-mounds 2065 



FLOATS Used by Eskimos 



as rollers 1759 



FLOES, Mirage among ice. . . 2219 



FLOOD, a fiery 3667 



at Tivoli *1259 



in White Mountains. . . *1260 



. (See also DELUGE.) 

 FLOOD-GATES in Irrigating 



ditches 1768 



FLOODS, Gradual distribu- 

 tion in place of 3132 



Incidents of a wise 



economy 1392 



FLOOR, Deposit on deep-sea 776 

 , Depth of rocks on, of 



ocean 2935 



, Ocean, of the North 



Atlantic 2449 



FLOW, Heat restored in 



'downward of river 2927 



of Past into present. . . 1105 

 FLOWER, Colors of petals. 478 

 , Contrivances aiding in 



fertilization of 50 



, Insect food of flower- 

 loving birds 1518 



. Pollen carried from 

 flower to flower 643 



, Self-sacrifice of 3059 



, Tubular, could not 

 produce humming-bird's 

 bill 1034 



FLOWERS, Adaptation of, 



to insects 50 



, Alpine amid snow. . . . 382 



, Ants useless to 210 



, Bee fertilizes 1889 



, Colors of, due to ab- 

 sorption 539 



, Our, could not grow on 



Mars 1439 



, Familiar, in strange 



lands 3541 



, Fertilized by insects 



784, 1686-87 



, Giant, of the tropics ... 1375 



, Gravity and 1439 



, Improved by selection 95 



and Insects co-operate 660 



, Puroose of color in ... . 537 



of Space 3212 



and Trees absorb differ- 

 ent colors 2737 



FLOWING of Metals 1254 



- of Metals Diffusion 2154-55 

 FLUCTUATION of Sea level . 629 

 FLUID, Digestive, of sun- 

 dew resembles gastric juice 1953 

 .Electric, misnomer 985 

 FLUIDS, "the Four cardinal" 3114 

 FLUORESCENCE Renders 



ultra-violet rays visible . . . 1765 



Reveals ultra-violet 



waves 1765 



FLY and Humble-bee 2183 



, Sting of causing death 2164 

 FLYCATCHERS, color of . . . 1047 

 FLYING-FISH, Movements of 2298 

 FLY-SHUTTLE, Invention of 1754 

 FLY-TRAP, Marginal spikes 



of Venus's 3577 



, Venus's 3637 



FLY-WHEEL for Spindles 

 and drills in ancient Amer- 

 ica 3727 



FOAM, Rich color of waves 



that break in 3708 



1111 



835 

 2753 



2491 

 169 



54 



FOCUS, Evolution out of .... 

 FOGIES, Most men, at 



twenty-five 



FOLK-LORE a Guide to the 



birth of invention 



FOLLOWERS, Originators 



and 



FOLLY of Serpent 



FOOD, Adaptation of plant 



for animal 



, Analysis of 1263 



, Aquatic birds find .... 1246 



Better than stimulant. *1273 



, Birds preparing, for 



their young 423 



, Boiling of, for the 



table 1789 



a Cause of migration. . *1265 



of Combustion 127 



, Cooking of 1236 



-, Cooking of Primi- 

 tive custom 1789 



Deeply affects organism *1261 



of Deep-sea animals.. . *1266 



, Definition of *1262 



, Dog tries to bury 1702 



, Endurance without . . . 2880 



of Entombed rhinoc- 

 eros *1267 



, Fallacy regarding *1263 



, Good, promotes t e m - 



perance 140 



, Growth due to animal. . 1 146 



, the Guardian of 3750 



, Increasing use of ani- 

 mal 2027 



, Insect, of flower-lov- 

 ing birds 1518 



, Is alcohol a 137, 2638-39 



, Leaves of insectivorous 



plants supply 562 



, Mechanism for securing 



insect 3637 



, Mortars for, found in 



all latitudes 2133 



, Natural constituents 



needed in . . . *1264 



, Nature sifts, of i n - 



sectivorous plants 3577 



, Permanent supply of *1272 



, Plain, best for con- 

 stant use 3597 



of Plant preserved *1268 



of Poor better than, 



of savage 498 



of Prehistoric man. . . . 2027 



Provided by man 1714 



, Purpose of *1262 



in Raw state 1263 



, Reduction of 522 



, Refrigeration of 1463 



, Relative purity of ani- 

 mal 2794 



of Savages *1269 



, Savory, nutritious .... *1274 

 , Smoke a preservative 



of 3131 



- Supplies fuel 2885 



, Toxic substance not ... *1275 

 , Universal article of 



Bread *1271 



, the Universal, rela- 

 tively pure 405 



, Varied, of man 2080 



, Varied, of parasite 2504 



, Variety of, a necessity . *1276 



of the World found in 



fruits and seeds *1270 



. (See also PLANTFOOD.) 



FOODS, Adulteration of .... *1277 



, Chemistry of *1279 



, Nutritive value of .... *1278 



FOOT of the Shrike 3521 



FOOTHOLD to Disease 3626 



FOOT-POUND a measure- 

 ment of energy 2127 



FOOTPRINT, Arab knows, 



of his camel 2543 



FORAMINIFERA Architects 



of chalk cliffs 220 



FORCE Apparently lost 2312 



of Association in mem- 

 ory 2892 



. *1282 



2692 

 2009 



551 

 1546 



427 



FORCE, Atomic, exceeds 



gravitation *1281 



.Brute, at highest 



point before man. 



, Circumstantial e v i - 



dence may have, of dem- 

 onstration 



in Coal supply 



, Coercive, in steel 



, Combination of, per- 

 ishable 



, Conception of difficult 



Connected with con- 

 scious mind 



, Constancy of 2267 



.Constancy of, with 



variety of adaptation 3601 



of Crystallization *1291 



, Direction of, the 



greatest power *1297 



, a Diversion of, impos- 

 sible 2936 



Economized 399 



, Electrical *1283 



, Energy and, discrim- 

 inated 1011 



, Enormous, of chemi- 

 cal combination *1284 



of Expansion resistless *1292 



.Expansive, of gun- 

 powder 2228 



Expended to convert 



water into steam *1285 



, Field of, around mag- 

 net 271,*1286 



, Gravitation surpassed 



by molecular 1404 



of Gravity at sun's sur- 

 face *1293-94 



from Heat 1467 



, Hypothesis of centers 



of 



, Increase of intellectual 



not Increased by ma- 

 chine 



, Increase of muscular .. 



.Indestructibility of 



matter and 



Inferior to mind 



, Language a living .... 



, Living, of moving 



bodies 



, Magnetic lines of 



, Man utilizes but does 



not create *1289 



a Manifestation of will 1299 



and Matter 1654 



, Matter analyzed into. . 3456 



, Mental, like light 



Misapplied 



, Nature of, unknown . . 



, Origin of, unknown . . . 



, Origin of idea of 



, Product of slight by 



vast period 



a Reflection of man's 

 conscious effort 



of Running water 



, Science has no explana- 

 tion of vital 



Stored in coal or zinc . . 



, Universe not merely .. . 



, Unseen power of mag- 

 netic 



, Vast results with tri- 

 fling 



, Vital, organizes mat- 

 ter 



, Volition 



, Weight balanced 



against disturbing 



, Will creates no 



, Will as distinct from 



impersonal 



FORCES, Accumulation of 

 ethical 



, Adjustment of mental . 



, Agency of contrasted. . 



, Balance of, on our globe 



, Composition of 



, Command of natural 



, Conflict of . 



2115 

 2186 



3002 

 53 



576 



2113 

 1816 



*1287 

 *1288 



2099 



*1290 



2371 



1857 

 *1296 



2745 



*1280 

 *1295 



1916 

 1013 

 3566 



1198 

 3439 



2475 

 3674 



3724 

 3733 



3731 



14 



73 



104 



307 



569 



2131 



2337 



-, Correlation of 3186, 3546 



