QUESTIONS FORMING A. COMPLETE INDEX. 



LESSON XIII. 



Candles, why do composite and 

 war not require snuffing ... 265 



Candle, what becomes of it after 

 it is burnt 289 



Capillary blood-vessels, why are 

 they found in every part of the 

 system 919 



Capillary attraction, what is it ... 780 



Carbonic acid gas, how is it 

 formed 9 



Carbonicacid gas, what becomes of it 10 



Carbonic acid gas, is it heavier or 

 lighter than air 11 



Carbonic acid gas, what are the 

 chief sources of ... 16 



Carbonic acid gas, what is its 

 effect upon the human system 21 



Carbonic acid gas, what becomes 

 of that formed by combustion 59 



Carbonic acid gas, what propor- 

 tion is dangerous to life 60 



Carbonic acid, what is it 798 



Carbonic acid, where does it 

 chiefly exist 799 



Carbonic acid, what a*e its pure 



18 



Carbon, what is it 



Carbon, will it produce flame 

 when burnt in oxygen 106 



Carbon and hydrogen, what dif- 

 ferences characterise the com- 

 bustion of 268 



LESSON XIV. 



Carbon, what is the purest form 

 of it 277 



Card, why do the images on each 

 side blend while a card is re- 

 volving 846 



Caterpillars, why do they appear 

 in the spring 1289 



Caterpillars, why do they eat vora- 

 ciously 1290 



Caterpillars, why do they pass 

 into the state of the chrysalis... 1291 



Caterpillars, why do they become 

 torpid in the chrysalis 1292 



Caterpillars, why do they attach 

 themselves to the leaves of 

 plants when in the chrysalis ...1294 



Cats, &c., why do they see in the 

 dark ... 981 



Cats' eyes, why are the pupils of 

 nearly closed by day 982 



Cats, &c., why have they whiskers 1096 



Cattle, why if they run round in 

 meadows may thunder be ex- 

 pected 1122 



Ceiling, how did Mr. Sands walk 

 on the 664 



Cliampasne, why does it effer- 

 vesce 806 



Champagne, why do bubbles rise 

 from it in two or three columns 807 



Charcoal, why is it dangerous to 

 burn it in rooms 20 



LESSON XV. 



Charcoal fires, why do they not 

 give flames 107 



Charcoal, what is it 275 



Charcoal, why does it act as a 

 disinfectant 809 



Chicory, what is it 1196 



Chimney, why does it cease smok- 

 ing after the fire has been lighted 

 a little while 680 



Chimney, why does a long one 

 create a better draught than a 

 short one 681 



Chimneys, why do some smoke 

 when windows and doors are 

 closed 683 



Chimneys that stand under 

 elevated objects, why do they 

 smoke 684 



Chimneys, why do sooty smoke ... 6*7 



Chimneys, why do they smoke in 

 damp and gusty weather ... 688 



Chimney, why does it smoke 

 when first lighted 679 



Chocolate, what is it 1194 



Circulation, why are the venous 

 blood and chyle sent to the 

 lungs 887 



Circulation, what is the course of 

 the arterial blood 888 



Circulation, why does the blood 

 impart vitality ... ... . 891 



LESSON XVI. 



Circulation, how do we know {he 

 blood is alive 892 



Circulation, why does the blood 

 circulate 893 



Circulation, how is the body 

 renewed by the blood 894 



Circulation, how does the blood 

 return to the lungs after it has 

 reached the extremities 895 



Circulation, why are the veins 

 more perceptible than the 

 arteries 897 



Circulation, why when we prick 

 the flesh does it bleed 893 



Circulation, what occurs during 

 the 899 



Circulation, what becomes of the 

 matter collected by the blood... 901 



Circulation, how is the blood pro- 

 pelled through the arteries ... 916 



Circulation, why are the capillary 

 vessels capable of receiving the 

 quantity of blood sent through 

 larger vessels 917 



Cinnamon, where is it produced... 1239 



Cleanliness, why does it promote 

 health 1015 



Clothes on fire, why should per- 

 sons throw themselves down ... 262 



Clothing, why do some articles 

 feel cold, and others warm ... 119 



