INDEX. 



Sight, how are defects in, detected 

 by jpticians 130 



Skin, why has it a purple hue 

 when cold 35 



Skin, why are the pores essential 

 to health 101 



Skull, why the only cavity in the 

 body not enclosed by a mem 

 brane 53 



Skull, why may the form of be 

 altered 92 



Skylark, why does the song of 

 vary 758 



Sloth, why does it utter the sound 

 of &quot;ai * 404 



Sloth, why able to exist through 

 winter without food 405 



Sloth, why well provided with 

 means of defence... ... ... 407 



Sloth, why erroneously considered 

 awkward ... 408 



Sloth, why has it difficulty in 

 walking on the ground 410 



Sloth, how adapted to the locali 

 ties it inhabits 413 



Sloth, habits and instincts of ... 415 



Smell, how is the sense produced 151 



Smell, why does sniffing air in 

 crease 152 



Smell, why does closing the mouth 

 increase ... ... ... ... 153 



Smelling, why are the organs of, 

 situated so near those of tasting 154 



Smell, why is the sense of, in dogs 

 acute 268 



Snake, how does it throw its body 

 from the ground 1021 



Snake-catchers, why are they able 

 to charm snakes 1025 



Snipe, why has it a long tapering 

 bill 894 



Snipes, why are their eyes back 

 ward in their heads 895 



Snipes, why do they not have long 

 hind toes 896 



Sole, why r^es its skin clear 

 coffee 1092 



Soles, why are they destitute of 

 air-bladders 1093 



Soles, why do they swim upon 

 their sides 1096 



Solids, their effect upon the body 40 



Solidungula, sol-id-uitg -yu-la ... 473 



Solidungulous animals, why found 

 in a wild state on plains 475 



Souslik, smcs -lik, why has it 

 pouches in its cheeks ... ... 359 



Sparrows, why useful to vegeta 

 tion 751 



Sparrows, why bolder than most 

 birds... .!. 752 



Sparrow, why does the house- 

 sparrow take the nests of other- 

 birds 753 



Sparrow, why late in awaking ... 754 



Species, what is the meaning of ... 1(53 



Spectacles, why needed in old age 129 



Spermaceti, what is it ... ... 587 



Spinal colmnr. why flexible ... 41 



Spine, why do not its movements 



injure the brain 



Spoonbill, why has it long man- 



dibles 



Sprats, what are they 

 Sprats, why do they usually ap 

 pear soon after herrings have 



spawned 

 Squintinsr, why some persons 



afflicted 



Squinting, how cured 



Squirrels, why do they convey 



food to their mouths with both 



paws 



Squirrels, why grouped as the 



genus sciurus 



Squirrels, why are their hind legs 



only slightly shorter than their 



forelegs 



Squirrels, why are their tails so 



long and bushy 

 Squirrels, why are their eyes fully 



developed 



Squirrels, why they lay up stores 

 Squirrels, w r hy some called flying 

 Sta?. why so eager to reach water 



before they stand at bay 



Stairs, why said to shed tears 

 Starlings, Why do they frequently 



accompany rooks ... 

 Statue, why cannot stand upright 



without support 



Stickleback, why are the fins 



nearest its gills continually 



moving 



Stomach, what is the form of 

 Stork, why an enemy of the cat 



species 



Storks, why are they voracious 



eaters 



Stork, why has it always been an 



object of favour and veneration 

 Swallows, why appoint a distinct 



ransre of elevation 

 Swallows, why adapted to migra 



tion 



Swallows, why are the nests made 



round 

 Swallows, why their mandibles 



open far back 

 Swallows, how do they build 



against walls 



Swallows, why do they build near 



dwellings of man 



Swallow, why is the esculent, so 



called 

 Swallows, why does their high 



flight foretell fine weather ... 

 Swans, wny do they frequent 



shallow waters 

 Swans, whv are their wings 



capable of dealing a heavy blow 

 Swans, why do they fly high 

 Swans, why is their flight governed 



by the wind ... ... .. 



Swan, why is its plumage un 

 changeable 



Swan, why is its dying song 



fabulous 



905 

 1057 



1058 



13 ! 

 133 



351 

 352 



353 

 355 



354 

 356 

 358 



527 

 555 



993 

 17 



1141 

 100 



907 

 908 

 909 

 712 

 713 

 714 

 726 

 71G 

 717 

 719 

 724 

 928 



929 

 9:&amp;gt;3 



9:?:? 

 QZ4 



