50 PLAIN FACTS FOR OLD AND YOUNG 



tobacco, and the various stimulating condiments, such 

 as mustard, pepper, pepper-sauce, etc., are among those 

 most commonly used. 



An examination of the blood after a sleepless night, 

 or when an insufficiency of food has been taken, shows 

 a very great decrease in the red blood corpuscles, which 

 sufficiently emphasizes the necessity for an abundance 

 of sleep and nutritious food. An eminent New York 

 physician claims to be able to tell by examination of 

 the blood whether a person has slept well the previous 

 night, or whether he has been indulging in excesses of 

 any sort. 



If the blood is kept pure and well supplied with the 

 elements necessary to build up the body, the organs of 

 the body will be quite certain to remain in health. 



Two Thousand Feet of Lungs.— Did you ever see 

 a frog drink!— Very likely not. Let us go in search 

 of some place where the croakers abound. Here we 

 are, and there is a big fellow sitting on the bank. Now 

 he goes, splash ! into the water, and away down out of 

 sight in the mud. Never mind, we will sit down and 

 rest quietly; soon we shall see him coming up to the 

 surface again to get a drink. There he comes now. 

 As he gets almost to the surface of the water, he lets 

 out of his mouth three or four big bubbles of air. He 

 comes slowly to the top, and protrudes above the water 

 the mere tip of his nose, in which we shall see, by look- 

 ing closely, two little holes scarcely larger than a pin. 



Drinking Air.— Now notice his broad throat. We 

 will see that it moves up and down as though he were 

 drinking. In fact, he is drinking, not water, but air. 

 The frog lives in such damp places, he probably never 

 gets dry, and so does not need to drink water; but air 

 he must drink, or he dies. 



