xiv 



INDEX. 



Elephant, why does it use its 

 trunk to seize a man and not 



to attack a tiger 441 



Elephant, why has it the power of 



bending the hind leg: forward 443 

 Elephant, docility and intelligence 



of 444 



Elephant, protecting the sick and 



dying- ... &quot; 445 



Elephant, going to a hospital to 



have Its wounds dressed 446 



Elephant, affection of, for its 



species 447 



Elephant, revenue of 448 



Elephant, sagacity of ... ... 449 



Elk, why is its neck so short ... 534 

 Ethiopian, why is the race so 



called ... 4 



Eye, why do the powers of vision 

 greatly depend on mechanical 



exercise 113 



Eye, the operation of in viewing 

 objects ... ... ... ... 115 



Eye, why is the motion of, essen 

 tial to vision ... ... ... 116 



Eye, why do the powers of, depend 



on development 117 



Eye, why does the pupil of, con- 



tract and dilate 121 



Eye, chamber of 122 



Eye, why unable to discern objects 

 &quot;when passing from strong light 



into darkness 123 



Eye, why inconvenienced when 

 emerging from darkness into 



light 124 



Eye, why is the pupil of, so called 125 

 Eye, why is it sometimes biood- 



&quot;shot 128 



Eye, why does it lose its lustre in 



old age and sickness 131 



Eye, what occasions squinting ... 132 

 Eye, why does it perceive colours 134 

 Eve, why does a blow produce a 



flash of light 136 



Eyeball, sensitiveness of, how ac 

 counted for 137 



Eye, why cannot it distinguish 

 minute objects when immersed 



in water 138 



Eyes, why furnished with lashes 139 

 Eyes, why protected by eyebrows 141 

 Eyes, furnished with eyelids ... 142 

 Eyelid, why the motions of, in 

 voluntary ... ... ... ... 141? 



Eyes of carnivorous animals, why 



are the pupils variously shaped 2^6 

 Eyes of animals, why do they 



glare in darkness 221 



Eyes of animals, why do they not 



glisten in the daylight 222 



Fairy-rings, why supposed to be 



caused by moles 199 



Falcon, why are its wings larger 



than those of the eagle 670 



Falcon, why is the optic nerve in 



its eye folded into plaits ... 671 

 Fat, why necessary to the system 3S 

 Fat, economy of 37 



Fear, why does it cause pale cheeks 79 

 Feet, how are the nails formed ... 2!? 

 Ferrets, why dangerous to keep ... 250 

 Feline animals, why when a per 



son ie struck by, should he not 



move ............ 211 



Ferret, why has the Nubian, valves 



to its ears ............ 311 



Fingei s, peculiar functions of ... 22 

 Fingers, why are their extremities 



soft and round ......... 24 



Fingers, why are thcv of unequal 



length ..... . ...... 25 



Fingers, why are the tops of, 



guarded by cushions ...... 26 



Fingers, why furnished with nails 27 

 Fishes, why is the first order of, 



called leptocardia ......... 1038 



Fishes, why is the second order of, 



called clyclostomata ...... 1039 



Fishes, why is the third older of, 



called teleostia ......... 1044 



Fishes, why do their spinous de 



fensive weapons turn backwards 1104 

 Fishes, why are some furnished 



with a sucker ......... 1111 



Fishes, why is the fourth order 



named ganoidea ......... 1121 



Fishes, why is the fifth order 



called selachia ......... 1124 



Fishes, how is their breathing 



conducted ............ 1131 



Fishes, why is their flesh white ... 1132 

 Fishes, why do they not masticate 



their food ............ 1133 



Fishes, why are their teeth curved 



inwards ............ 1131 



Fishes, why do they gasp when 



out of water ......... 1135 



Fishes, why can some live long 



out of water ......... 1136 



Fishes, why are the crystalline 



lenses of their eyes round ... 1137 

 Fishes, why do they lie with their 



heads against the stream ... 1139 

 Fishes, why do some swim at the 



surface, and others near the 



bottom ............ 1143 



Fishes, why when they have 



broken away with a hook will 



they take another immediately... 1144 

 Fishes, why do their wounds 



rapidly heal ......... 1146 



Fishes, why are they exempt from 



disease &quot; ............ 1146 



Fishes, why the sub-order of ana- 

 canthina so called ...... 1088 



Fishes, why do they float when 



dead ....... .&quot; ....... 1094 



Fishes, why is the sub-order of 



physomata so named ...... 104 



Fishes, why may they be drowned 



while being caught 



Fishes, why are the migrations of, 

 beneficial 



1147 

 1149 



ishes, 

 shallow waters ......... 1150 



Fissirostres, fia-sc-ros -trees, why 

 so designated ...... .. . 711 



