QUESTIONS FORMING A COMPLETE INDEX. 



XI* 



LESSON XLIX. 



Matches, do they ignite sponta- 

 neously 313 



Meat, why is it sooner cooked 

 when a tin screen is placed be- 

 fore the fire 213 



Metal, why does it run like a fluid 

 when melted 333 



Mirrors, why do we see our fea 

 tares therein 209 



Mirrors, why do we see our faces 

 in them 512 



Mirrors, what has the glass of to 

 do with the reflection 514 



Mirrors, why do compound mir- 

 rors reflect many images of one 

 object 515 



Mirrors, why do reflections appear 

 as far behind a mirror as the 

 object reflected stands before it 518 



Mirage, what is the cause of the ... 527 



Mists, what are they 368 



Mists and fogs, what is the differ- 

 ence between them ... ... 369 



Mists end fogs, why do they disap- 

 pear at sunrise ... ... ' ... 370 



Mistletoe, why have its berries a 

 thick viscid juice 1177 



Mistletoe, how are its seeds con- 

 veyed to the bark of trees ... 1178 



Moles, why have they hard flat feet 1074 



Mole's fur, why is it glossy and 

 smooth 1075 



LESSON L. 



Moles, why are they permanent ... 904 

 Moles, why may rain be expected 

 when they throw up their hills 1117 



Monsoons, what are they 672 



Monsoons, what is the cause of ... 673 

 Mornings, why are they usually 



clear when frosty 410 



Mother-of-penrl, vyhat causes the 



rich tints displayed by 500 



Moths, why do they fly by night ... 1297 

 Moths, why are their bodies gen- 

 erally covered with thick down 1228 

 Moths, why do they fly against the 



candle-flame 1299 



Muscles, how many are there in 



the human body 941 



Muscle, what is the constitution of a 942 

 Muscles, what degree of strength 



do they possess 945 



Muscles, what is the stimulus which 

 sets them in action ... ... 946 



Mussels, why have they tendi- 

 nous cords proceeding from 

 their shells 1086 



Natural phenomena, a world of 

 miniature ... ... ... ... 690 



Nails, why have we got them at the 

 fingers' ends 908 



Kails,' why is there a circular line of 

 whitish colour at the root of the 909 



LESSON LI. 

 Nails, why do white spots occur 



upon the 910 



Needle, why will it float if laid care- 

 fully upon water 795 



Nerves, what are they 951 



Nervous system, of what does it 



consist 955 



Nerve, what is the constitution of a 956 



Nervous fluid, what is the 957 



Nerves, how many kinds are there 958 



Nerves of motion, what are they ... 959 



Nerves of sensation, what are they 960 



Nerves of special sense, what are ... 961 



Nerves of sympathy, what are the 962 

 Nights, why are they usually cold 



when clear ... 411 



Nitrogen, what is it 33 



Nitrogen, where is it found ... 34 



Nitrogen, could animals live in it 37 

 Nitrogen, is it taken into the blood 



from the air ... ... ... 40 



Nitrogen, will it burn 44 



Nitrogen, what becomes of that 



which is inhaled ... ... ... 46 



Nitrogen, where does it find a 



fresh supply of oxygen 47 



Nitrous oxyde, why does it excite 



the system 38 



Non-conductors of heat, what sub- 

 stances are Ill 



Nostrils, why are they directed 



downwards 994 



LESSON LII. 

 Nose, why is it placed over the 



mouth 995 



Nutmegs, where are they produced 1232 



Ocean, how is it heated 233 



Oils and fats, what are vegetable ... 1204 



Oils and fats, animal, why are they 

 found most abundantly in cold 

 climates ' ... 120J 



Oils and fats, vegetable, why are 

 they found most abundantly in 

 hot countries 120? 



Opium, what is it 1258 



Ostriches, why have they small 

 wings 1031 



Ostriches, why are their feathers 

 soft and downy ... ... ... 1032 



Otters, seals, &c., why have they 

 web-feet 1062 



Owls, why does their screeching 

 denote change of weather ...1111 



Owls, why does their moping fore- 

 tell death 1112 



Oxen, sheep, deer, &c., why do 

 they ruminate 1088 



Oxen, and other quadrupeds, why 

 have they a tough elastic lig- 

 ament in their necks 1138 



Oxygen, why is it necessary to life 5 



Oxygen, what is its union with 

 carbon called 7 



