CHAPTER XIX 



THE LARGEST COMPONENT OF JACK'S HOUSE WATER 



WATER is the largest component of the Wonderful 

 House that Jack Has. How much this common 

 liquid has added to our pleasure since babyhood ! 

 In summer, we have sailed 

 tiny boats and gone swim- 

 ming in it. In winter, 

 many a merry hour of 

 skating on its frozen sur- 

 face has been our delight. 

 How often, when we have 

 been tired and thirsty, it 

 has revived and strength- 



Sailing tiny boats. 



ened us ! We, perhaps, 



have never thought why a glass of water is so refresh- 

 ing, though the pangs of thirst have told in no uncer- 

 tain way that it is absolutely necessary to our health 

 and comfort. 



If two-thirds of a house were wood, and a certain 

 amount were worn off each day, the portion lost would 

 have to be replaced, or it would soon tumble down. 

 Now, strange as it may seem, chemists estimate that 



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