INDEX. 



Xl 



females more sombre than of 



males ............ 976 



Birds, why is their plumage som- 



bre when young ......... 977 



Birds, what provision is illustrated 



in the disposition of their 



feathers ............ 979 



Birds, how is their varied plumage 



accounted for ......... 980 



Birds, how do they maintain a 



standing position ......... 982 



Birds, why do many roost upon 



one leg ............ 984 



Birds, why do their beaks indicate 



their peculiar food ...... 985 



Birds, why are their eyes 



adapted to any range of sight ... 987 

 Birds, why does their hearing 



mainly depend upon the internal 



structure of the organ ...... 989 



Birds, why do they perch with 



their faces to the wind ...... 990 



Birds, how are they able to sleep 



securely when perched on the 



branches of trees ......... 992 



Bison, why able to use its horns 



with more effect than the ox... 530 

 Bittern, whv are its habits little 



known " ............ 914 



Bittern, mode of squatting de- 



scribed ............ 915 



Bleak, why called the water- 



swallow ............ rO'^1 



Bleeding, why when the operation 



is performed, are the veins 



bound ............ 77 



Blindness, a person cured of ... 118 

 Blindness, sensibility of touch in 



cases ............... 157 



Blood, how formed ......... 69 



Blood, the composition of ...... 70 



Blood, how circulated and puri- 



fied ............... 71 



Blood, illustration of the heart's 



action ............ 72 



Blood, why so important an agent 



in animal economy ...... 73 



Blood, the circulation of ...... 74 



Bloodshot, why does the eye 



become ... ... ... ... 128 



Bloodhounds, why efficacious in 



the pursuit of fugitives ...... 2G6 



Bodies, animal, why they vary 



most in the centre ... ... 16 



Bones, why covered with perios- 



teum ............. 43 



Bones, the distinct and mutual 



uses of ... ... ... ... 45 



Bones, softness of, in infancy ... 46 

 Bones, cylindrical ......... 47 



Bones, why do they not touch... 57 

 Bones, why covered with cartilage 67 

 Bower-bird, why so called ... 692 



Bower-bird, habits of ...... 693 



Bruin, the composition of ... 89 

 Brain, functions of the gieat and 



90 



B i' > wh> not injured 

 movement <>f the spine .. 



the 



Breathing, why it causes the chest 



to heave ... ... ... ... 86 



Breathing, offices of the ribs and 



diaphragm ............ 87 



Buffaloes, why the horns of, are 



useful to the animal ...... 523 



Bull-frog, how does it produce a 



noise ............... 1030 



Butcher-bird, why so called ... 689 

 Camel, difference between it and 



the dromedary ... ... ... 513 



Camel, why so called ...... 544 



Camel, why is its neck long and 



flexible ............ 516 



Camel, why is the formation of 



the stomach of, adapted for 



long journeys over deserts ... 519 

 Camel, why have its feet large 



cushions ... ... ... ... 521 



Camel, how are its eyes protected 522 

 Camel, adaptation of its teeth for 



food ............ 522 



Canary, the plumage of ...... 763 



Canine teeth, why are carnivorous 



animals provided with ...... 206 



Carnaria, kar-nar'-i-a, why is the 



third division of the Mammalia 



so called ............ 183 



Carnaria, why is the first sub- 



order called cheiroptera ...... 184 



Carnaria, why is the second sub- 



order called insecti vora ...... 



192 

 205 



Carnaria, why is the third sub- 

 order called carnivora ...... 



Carnivora, kar-niv'-o-ra, why is 

 the third sub-order of carnaria 

 so called ............ 2l 5 



Carnivorous animals, why have 

 they canine teeth ......... 20fc 



Carnivorous animals, why are 

 their molar teeth fitted into 

 each other ............ 207 



Carnivora, how does their anatomy 

 adapt itself to their modes of 

 life ............... 208 



Carnivorous animals, why are 

 the pupils of their e^es vari- 

 ously shaped ......... 216 



Carnivorous animals, why in- 

 cluded in all the natural classes 219 



Cartilage ............ 66 



Catalepsy ............ 107 



Cat-bird, why so named ...... 694 



Cats, why when playing do they 

 turn on their backs and seize 

 with their claws 



22" 

 224 



Cats, why does cropping their ears 



prevent their climbing trees ... 

 Cats, why does their fur emit 



electrical sparks ......... 227 



Cats, purpose served by their 



electricity ......... ... 227 



Cats, why are they uneasy pre- 



vious to a sform ......... 228 



Cats, by what means are they 



enabled to extend or withdraw 



their talons 



Cats, why do they refuse vege- 

 table food ............ 



229 

 231 



