SCIENTIFIC SIDE-LIGHTS 



PLANTS, Dispersion of, ef- 



fected by animals ........ 870 



-- , Dispersion of, effected 



by man ................. 871 



- , Distribution of, irregu- 



lar ..................... 833 



- Eating insects ........ 2471 



- of Egypt ............. 983 



- Extended by runners. . *2618 



- , Faculty of Movement 



with reference to ends .... 2295 



- , Fixation of nitrogen in 



soil for .................. 2425 



- , Frost destroys weak . . . 3052 



- with Good intentions. . *2623 



- , Growing ............. 3249 



- , Insectivorous, "fed" 



and "starved." .......... 1146 



- , Insectivorous, flourish 



in poor soil .............. 562 



- , Leaves vertical i n 

 sleeping. ... ............ 1842 



- , Lessons in ........... 2376 



- , Life of, dependent on 

 "sleep/' ................. 1874 



- , Light essential to 

 growth of ............... 1936 



- , Microbes fix nitrogen 



for ..................... 2469 



- , Migration of ...... 1009, 2175 



- , Molecular changes in . . 478 



- , Mothering ......... 2105 



- , Motion within the walls 



of ...................... 2269 



- , Movement in. . ____ 2286, 2287 



- , Moving, among rooted 

 animals ................. 2471 



- , Nature sifts food of in- 

 sectivorous .............. 3577 



- Need uniform heat ____ 1462 



- , Nitrogen supplied to, 



by bacteria .............. 2426 



- of North America 

 found in Japan .......... 



- , Parasites among ...... 



- , Protected against use- 

 less insects .............. 



- , Protection of, by "sleep 



- , Protection of , by snow . 



- , Purpose in the move- 

 ment of leaves of ......... 



- , Reciprocal service of, 

 and animals ............. 



- Resisting improve- 

 ment ................... 



-- .Sensitiveness of, to 

 light ................... 



- Separate rocks ....... 



- , "Sleep" of ........... 



........... 763, 1874, 2778,3127 



- , "Sleep" of, observed.. . 763 



- , Space draining, of heat 2818 



- Struggle for life among 



- Struggle of, for life 

 lessened ................ 



- in Subterranean cavi- 

 ties ..... ......... ...... 



-- Supplied with nitrogen 



by micro-organisms ...... *2629 



- Thrive in new soil ..... *1009 



- , Variability of . . ....... 



- , Water a protection to . . 

 PLASTICITY of character be- 



fore twenty .............. 



-- Characterizes life ..... 



- , Infancy a period of. ... 



- of Iron .............. 



- of Structure that yields, 

 but not all at once. . ...... 



PLATE, Microscopic lines on 

 glass ................... 



PLATEAU, the Blind Philos- 

 sopher .................. 



PLATES, Color of thin. . .549, *2625 



- , Crossed, produce dark- 



ness .................... 2643 



- , Movable, adjustable to 

 pressure ................ 



PLATO.Compared with Mill. 



- Finds matter source of 

 evil .................... 



-- , Inspiration likened to 



magnetism .............. 2008 



*2620 

 1994 



*2621 

 2778 

 2773 



2799 

 3086 

 1667 



3080 

 1917 



3259 

 2175 



*2619 



3600 

 3700 



3797 



*2624 



1648 



2009 



3524 

 3393 

 3134 



56 

 910 



2316 



PLATO Potential in fires of 



sun 1099 



, His " Realm of Ideas." 2562 



, True conception of . . 2898 



PLAY an Art of pleasure *2627 



, Houdin's, with balls. . . 69 



an Indication of intelli- 

 gence 2626 



, Logic of 1984 



of Young animals and 



children *2628 



PLAY-GROUND, Open space 



for .... 171 



PLAY-HOUSES of the Bower 



bird *2629 



PLEASURE the Concomitant 



of activity 3550 



, Cost of 675 



, Desire to impart 1024 



, Expression of *2630 



, Intense, annuls space . . 3420 



, Progress by disregard of 2748 



, Singing a , t o song-birds 3113 



, Strange, in desolation.. *2631 



PLEDGE, Utility of *2632 



PLEIADES, Origin of the 



name *2633 



, Six or seven stars seen 



in the 619 



Unchanging 2465 



PLINY, Eruption of Vesuvius 



described by 1080 



PLIOCENE PERIOD, Mam- 

 malian life in 2013 



PLOVER, Migration of 2174 



PLUMMET, a Mountain for a 2124 

 PLUMS, Enemies of, pursu- 

 ing plant 67 



PLUTONIC ROCK, Granite a 469 

 POET Shows true scientific 



insight *2634 



POETRY, Crystalline orb of. 3559 



, Darwin's distaste for. . 282 



, Enjoyment expressed 



in Hebrew 1025 



a Form of science 157 



Has existed without 



science *2635 



_, Higher, revealed by 



science 2344 



, Influence of nature on. 1670 



, Nature in Greek 336 



, Power of *2636 



of Science 2636 



, Study in Persian 234 



, Truth the criterion of 3503 



POINT OF VIEW, Difference 



in 3115 



POINTS, Debatable, settled . *2637 



POISON, Alcohol a 



..137, 1221, *2638-39 



, Bacteria, by their prod- 

 ucts 2899 



of Cayenne *2640 



, Gradually eliminated 



from the blood 1745 



, Small doses of 133 



POISONING, Cumulative.. *2641 

 POISON IVY, Birds that 



thrive on 702 



, Found in America and 



Japan 2620 



POISON OAK found in 



America and Japan 2620 



POISONS of Microbes mutu- 

 ally destructive *2642 



Used on weapons. . . . 3721 



POLAR BEAR, Coloration of 47 



POLAR HARE, Coloration of 47 



POLARITY of Atoms 278 



in Growth of crystal ... 667 



of Molecules 966 



, Unsuspected 2484 



POLARIZATION of Light. . . *2643 



Used in observing sun. 1384 



POLAR STAR, Change of 



place of 3651 



POLE, Revolution of mag- 

 netic 927 



, Stars seem to revolve 



around the 3651 



POLES, force around the, 



of a magnet 271 



POLITICAL ECONOMISTS 



Hostile to labor reform. . 



POLITICAL PHILOSOPHY, 

 Modern, in contrast to an- 

 cient 



POLITICS an Education. 



. Science of 



POLLEN, Bee gathering. 



, Bee made to carry. 



, Care in preparing 



, Insects carry away . . . 



POLLUTION, Gross, under 

 ordinary condition 



, Infinitesimal 



-, Mistaken attempt at 



1515 



791 



*2644 



3000 



3410 



643 

 1627 



105 



515 

 1114 



Cleanliness causes 1652 



at the Source *2645 



POLYGAMY Not primeval. . . *2646 

 POMPEII, Earthquake at ... 

 , Shells preserved un- 

 changed 



POND- WEEDS . Transported 



by animals 



POOR Better fed than sav- 



3097 

 3039 



498 



3017 



3037 

 1864 



121 



3501 

 3020 



447 



Copernicus dedicates 

 great discovery to the. . . 



POPLAR, Seeds of, like snow- 

 flakes 



POPLAR of the Tertiary 



POPPY Raised by lake- 

 dwellers 



POPULAR Observation of 

 scientific truth 



Observation true 



POPULATION, Cells the, of 



vital kingdom 



, jSilent evidence of dense 



agricultural 2272 



PORES, Invisible 214 



PORPHYRY, 940 



PORPOISE Not a fish 2014 



PORPOISES Swimming in 



paths of light . . 2588 

 PORTRAIT, Profile gives of- 

 fense to savages 9 



Gives sense of reality . . 2435 



PORTRAITS, Superstition as 



to 3321 



POSSESSION, Belief in de- 

 moniac 704 



POSSESSIONS May possess . 1032 

 POSSIBILITIES of the Bicycle 3480 



of Existence outrun 



imagination 1169 



of Future in brain of 



primitive man 403 



of New implements 



exhausted 1751 



of Persecution in name 



of science 834 



, Selection among simul- 

 taneous 3043 



POSSIBILITY of Exclu- 

 sion 1367 



, Man cannot set bound- 

 aries of 836 



POSITION of Agnosticism . . . 3530 



, Change of, of fixed stars 466 



, Energy of ... 1015, 1016, 3702 



, Official, in life 1016 



, Reversal of all ideas 



of 467 



POSITIVISM, Delusion of. ... 1586 

 , Metaphysics of 2159 



Would assign sociology 



to a caste 834 



POSTURE, Erect, not attain- 

 ed by orang 1178 



, Erect, of man 2017 



POTATOES, Brown-rot of. . . 1887 

 Thrive in new soil . . . 1009 



POTENTIALITY of Queen- 

 bee a Problem 3459 



POTTER, Woman the prim- 

 itive 3091 



POTTER'S WHEEL Known 



from early antiquity *2647 



POTTERY, Ancient, modelled 



on basket-work *2648 



, Antiquity of 196 



, Importance of, to prim- 

 itive man. . . *2649 



