A pipe in a trench.A PIPE FOR THE CITY WATER SUPPLYThis pipe is laid for many miles to bring water from the distant hills.
A PIPE FOR THE CITY WATER SUPPLY
This pipe is laid for many miles to bring water from the distant hills.
We are still, however, far from being as careful as we should be about this; and I am sorry to say that America has had more deaths from typhoid fever than any other civilized country. Germany, which, of all countries in the world, is the most particular about keeping its water supply pure, has the fewest deaths from this cause, in proportion to its population—scarcely one fifth as many as we have.
Therefore, by taking proper care, it would be quite possible to prevent at least two thirds of our nearly 400,000 cases of typhoid fever and 35,000 deaths from typhoid, every year.
It is not only cities and towns that ought to be careful of their water supply. In fact, now, out on the farms and in the healthy country districts, the death rate from typhoid fever has actually become higher than it is in our large cities. The main cause of this is the custom of digging the well in such a place that the waste water thrown out from the house, or the drainage from the barnyard or the pigpen or the chicken-house may wash into it, soaking down through the porous soil. Far more typhoid fever now is spread by means of infected well water than by any other means.
Most dangerous of all is the leakage from the privy vault; as, by this means, the germs of typhoid fever and other diseases that affect the food tube and digestion may drain through the soil till they reach the drinking water in the well. These dangers can be avoided either by having the well dug at some distance from the house and in higher ground, or by having the drainage from the house, barns, and out-buildings piped and carried to a safe distance from the well.
Fortunately, there are only a few kinds of germs that make us sick. Most germs are helping us all the time; we could not live without them. Some of them make our butter taste good, and others make our crops grow, and others eat up the dirt that would make us sick. But since disease germs are so tiny that we cannot possibly see them with the naked eye, we must know where the water and milk that we use come from, and whether or not they are perfectly clean. Boiling the water will kill these germs and make the water pure. It is better not to boil milk if it can be had from a dairy where the stable and the cows and the milkmen and the pails and bottles are quite clean.
The fruits and fruit juices—lemon and orange and raspberry and lime and grape—give nice wholesome drinks. Home-made juices are much better than those you buy; you can be sure that they are pure and really made from fruit. And just here I want to caution you against buying “pink lemonade” or soda water or any other drink of that sort from the penny venders and open stalls on the street. The drinks they sell are not made from pure fruit juices, but from different flavoring extracts that are made to taste like the fruit and are colored with cheapdyes. Even the sweetening in them is not pure sugar, and they are often made or handled in a careless, dirty manner, or exposed to the dust of the street, and to flies.
Not long ago I was at the home of a friend where for supper we had the nicest grape juice I ever tasted. When I said, “How good it is!” one of the little girls piped up, “Billy and I picked the grapes, and sister made it all by herself. She learned how at cooking school.”
When I was packing my suitcase to leave, this little girl brought out a big bottle of grape juice and wanted me to take it with me to remember her by. It was all beautifully sealed with wax, and even this she had done by herself! Do you think I could have kept it that way very long? Perhaps not, it was so good; but if I had wanted it for a keepsake, I could have kept it, sealed as it was, for years and years, and it would have been just as sweet and fresh as when it was given to me.
Suppose, instead of keeping it in its bottle, I had poured it out into a glass. Can you tell me what would have happened to it then?
In a few days little bubbles would have come, one after another, up to the top of the juice; and soon it would have been all full of bubbles. Whatcauses the bubbles? Floating all about in the air and sunshine are tiny specks calledspores. These are to the tinyyeastplants what seeds are to other plants. Seeds fall into the ground and grow, but these yeast spores fall into the grape juice and grow. While they are growing in the grape juice, they eat what they want from the juice; and, as they eat, they make bubbles of carbon dioxid,—which, you remember, forms in our lungs and looks like air,—and of another substance calledalcohol. Of course, when they have changed the juice in this way, it tastes very different. It is then what we callfermented.
Fermented drinks are harmful; but some people like bubbling drinks so much that they leave good fresh grape juice open on purpose to let the little yeast plants get into it and make it into what we callwine. They treat apple juice in just the same way to makecider; and they even take fresh rye and barley and corn, and mash them up, and put yeast plants into the mash to ferment them and make them intowhiskeyandbeer. It does seem a pity, doesn’t it, to take good foods like wheat and apples and grapes and make them into these things that really do us harm if we drink them.
A very wise man named Solomon, who lived thousands of years ago, warned people not to drink wine, not even to look at it when it sparkled in the cup. He said no really wise man would drink it. Of course not; the wise man uses the food and drink that make his body grow strong and his brain work true, and no fermented drink can do that.
There is no better drink for anyone than clear pure water, and no better food and drink in one than pure fresh milk.
Children in smocks and chef hats are busy at big tables.A SCHOOL KITCHEN WHERE BOTH BOYS AND GIRLS LEARN TO COOK
A SCHOOL KITCHEN WHERE BOTH BOYS AND GIRLS LEARN TO COOK
If you have to come so far to school that you cannot go back to dinner and so must bring a luncheon with you, be sure to take plenty of time to sit down and eat it slowly and chew every piece of food thoroughly. Many children who bring luncheons to school just grab a piece of food in each hand and “bolt” it down as fast as they can possibly bite it off and swallow it, and then rush out to play.
Play is good and very important, but you had better spare ten or fifteen minutes of it in order to chew your lunch thoroughly and swallow it slowly, and then to sit or move about quietly for a few minutes before starting to play hard.This will give your stomach a chance to get all the blood it wants to use in digesting the food; for, you remember, when you romp and play, your blood moves outward toward your skin and away from your stomach. Don’t think that, just because you “picnic” at lunch, it is not as important as any other meal.
I hope, however, that it will not be long before almost every school will have a school kitchen and a lunch room; first, so that every girl at least can learn to cook. It is well worth while being able to do; indeed, no girl ought to be considered properly educated until she has learned to cook, and no boy either, for that matter. Then, if the school has this kitchen, it can be used to furnish hot luncheons, or dinners, for those children who cannot conveniently go home in the noon recess. Hot lunches are much more digestible than cold ones, and they taste much better, and are much less likely to be eaten in a hurry.
But why should we learn to cook? Why shouldn’t we eat our food raw instead of taking all this trouble and pains to cook it?
I know of a boy—a big lazy fellow—who is always forgetting to do things. He used to go away in the morning without leaving wood enough for the kitchen fire. So his mother saidto herself one day, “I’ll teach him to remember.” The next morning he went off again and left no wood. At noon he came back “hungry as a hunter.” She called him in to dinner; and in he came, sat down, picked up the carving knife—then he stopped! What do you suppose was the matter? The beef was raw! Then he lifted the cover of the potato dish, and there lay the potatoes raw! Then he tried another dish and found nice green peas, but hard as little bullets. They were raw, too! Not even the bread had been cooked; it was a soft, sticky mass of dough. His mother, who is a jolly old lady, fairly shook with laughter when she told me about it. She said she never again had to tell him to split wood.
Now that boy didn’t need to be told one reason for cooking. We don’t like our food raw; it doesn’t taste so good. At first, perhaps, that doesn’t sound like a very good reason; but it is more important than you think. For it is a fact that, just as soon as you smell food, your stomach begins to get ready the juice that is to digest it. If this very first juice, which is called theappetite juice, is not poured out, then the food may lie in the stomach some little time before it begins to be digested at all. So it is quite important that our food should smell and tasteand look good, as well as have plenty of strength and nourishment in it.
Another reason for cooking is that it either softens or crisps our food so that we can chew it better and digest it more readily. You know what a difference there is between trying to eat a raw potato and a nice, mealy, well-baked one, or trying to eat popcorn before it is popped and after.
Another good thing, too, cooking does, which is very important. It kills any disease germs, or germs of decay, that may happen to have got upon the food from dust or flies, or from careless, dirty handling.
Of course, some of our food, such as apples and other ripe fruits, and celery and lettuce and other green vegetables, we can eat raw and digest quite well; but we should be careful to see that they have been thoroughly washed with water that we know to be pure. Grocers often have a careless way of putting fruit and vegetables out upon open stands in front of the shop, or in open boxes or baskets inside the store, and leaving them there all day. This is very dangerous, because dust from the street, which contains horse manure and all sorts of germs, may blow in upon them; flies, which have been eating garbageor feeding at the mouths of sewers, may come in and crawl over them. You ought to be very sure that anything that you are going to eat raw, or without thorough cooking, has been well washed. And you ought to ask your mother to speak to your grocer, if he is careless in this way, and have him keep his fruit and vegetables, as well as sugar and crackers and beans and dried fruit, either under glass or well screened from flies and dust.
More important than almost anything else in good cookery is to keep the food and the kitchen and the dishes and your hands perfectly clean all the way through, so that nothing that will upset your digestion can get into the food. After things are well cooked, it is very important that they should be nicely served on clean dishes, on a clean table cloth, with polished knives and shining spoons and forks. This means not only that everything about the table and the food will be perfectly clean and wholesome, but that you will enjoy eating it a great deal more. And when you enjoy your food, you remember, your stomach cansecretethe juice that is needed to digest it, very much faster and better than when, as you say, you are just “poking it down.”
If you have a school kitchen and a lunchroom, you can learn the best way of cooking and serving things; and then, perhaps, you can do these same things at home and be a real help. Most children are fond of trying to cook, and I am glad that they are. Everyone, boys and girls both, should know how to cook simple things. Perhaps some day you will be stranded, like Robinson Crusoe, on a desert island! Perhaps the rest of the family may be sick. How nice it would be for you to be able to prepare breakfast for them. I know a family where the youngest boy often rises early and gets breakfast for five. He can fry the bacon and boil the eggs and make the coffee and mush and biscuit just as nicely as his mother can; and he takes pride in it and enjoys it.
Cooking is what we call an art. Everyone, of course, can learn to do it; but some people can do it much better than others, just as some boys and girls can draw better than others. I hope some of you will be what we might call “artist cooks.” Take pride in the art and learn all that you can about it. There are so many things a cook should know.
A great deal of good food is spoiled by bad cookery, particularly by frying slowly in tepid grease, or fat, so that it becomes soaked withgrease. You should have the frying pan just as hot as possible before you begin to fry; and then the meat or potatoes or cakes will be seared, or coated over, on the outside, so that the fat cannot soak into them, and they will not only taste better, but will be much more digestible.
In baking you will have to be careful not to let the oven become too hot, or else the meat or bread will be burned or scorched. Even if the heat does not do this, it may harden and toughen the outside of the meat so that it is almost impossible either to chew or digest.
Sugar is really a very good food if you do not eat too much at once, and so pure candy is good for you if you do not eat too much. The very best time to eat it is at the end of a meal. If you learn to make it at school or at home, you can always have some to eat after your luncheon without having to buy it. If you do buy candy, don’t get the bright colored kind; it looks pretty, but it may hurt you. And be sure to see that it has been kept under a cover, where the dust and flies could not get at it. Dust is dirty, and flies don’t wipe their feet. You want clean, pure candy.
Of course, after cooking, you will always be very careful to wash up all the pots and pans and dishes that you have used. Food and scrapsthat are left sticking to dishes and cooking utensils very quickly turn sour and decay; and then the next time the dishes are used, you will perhaps have an attack of indigestion, and wonder why.
There are two things you should always notice: Whether the bread you eat is sweet and thoroughly baked; if it is soggy and sour, it will make trouble in your stomach. Whether all your food is clean and fresh before it is cooked; this you can tell by your eyes and nose.
When, at home, you give the baby a ball or a key or a watch to play with, what does he do with it the very first thing? He is never quite happy, is he, until he has put it into his mouth? Does he want to eat it? No, he wants to feel it; and he has not yet learned to feel very carefully with his hands, as you do.
Can you feel with your mouth? If you have the least little hole in one of your teeth, you know it as soon as you rub your tongue against it. How big it feels and how rough the edges seem! If you take a looking-glass, you find, if you can see the hole at all, that it is just a tiny, tiny hole.
Your tongue and lips, like the rest of your skin,are always touching and feeling things for you and sending messages to the brain. They say whether your milk is hot or cold, and whether the food you eat is soft enough and quite right in other ways. Your tongue is a very busy little “waiter”: he passes the food about in your mouth for the teeth to chew, and he rolls it about at a great rate. But he does more than this; he tells you something about how it tastes—not everything, as you may think, but only whether it isbitter,sweet,sour, orsalty. Queer as it may seem, your nose tells you the other “tastes,” which are really smells. It is your nose that says whether you have a strawberry or a piece of onion in your mouth, whether it is coffee or cocoa that you are drinking.
Of what other use is your nose?—for only a little patch in the upper part is for smelling and tasting. The greater part of the nose is to breathe through. You see, your nose warms and moistens the outside air that you take in, so that, by the time it reaches your throat, it is as warm as your body and does not hurt your throat. Your nose also strains, or filters, out of the air the dust, lint, and germs that may be floating in it.
You should always keep your lips closed and breathe through your nose. Whenever you cannotbreathe through your nose, there is something the matter. It may be that your nose is swollen shut with a “cold”; but that will last only a few days. If, however, your nose often feels “stuffed up,” there is probably something in it or behind it, that ought to be taken away. A throat doctor can easily cure you; and, when he has, you’ll be surprised how much better you feel and how much faster you grow.
A side-view diagram of the mouth, nose and throat.A CLEAR PASSAGE TO THE LUNGS(Follow the arrows.)
A CLEAR PASSAGE TO THE LUNGS
(Follow the arrows.)
I once knew a little girl whose nose was always blocked up. She had headache and felt tired most of the time and was behind in her classes. The doctor told her what was the matter, but her father and mother were afraid that it might hurt her to have the doctor take out what was clogging her nose. Well, what did she do? Insteadof crying and being afraid, one day she walked right into the doctor’s office and asked him to take out theadenoids, as we call these growths that block up the nose. And after the doctor had taken them out, she began to grow well and fat and strong so fast that she soon “caught up” in her classes.
A diagram of the nose and the back of the throat.A PASSAGE BLOCKED BY ADENOIDS
A PASSAGE BLOCKED BY ADENOIDS
When you breathe well through your nose, you can smell and taste better, too. In fact, when your nose is clogged, you cannot smell at all.
How does this sense of smell help us? You say we can smell the flowers and the fresh air after the rain, and cookies baking, and all the things that we like so well. Yes, and these give us pleasure; but how about the bad smells? The bad smells are warnings. If there is a dead mouse or rat about, we smell it; and that leads us to look for it and take it away. We smell the dirt and get rid of it, and thus keep away sickness. When we walk into a room, if the air is bad wesmell it at once and open a window or a door, and so save ourselves from being poisoned.
Some people hurt their noses by smoking tobacco. The inside skin of the nose is very delicate, and the smoke going back and forth through the nose and the throat keeps them from doing their work properly. It is very bad for little children even to smell tobacco smoke. It seems in some way to keep them from growing as they would in clear fresh air. What a silly habit smoking is! It does no one any good. It hurts not only the people who make the smoke, but the people who have to smell it. Most of the people who smoke tobacco have to learn to like it. It almost always makes them very sick when they first begin.
Sir Walter Raleigh, or the men he sent to America, first taught our great-great-great-grandfathers to smoke. His men bought tobacco of the Indians here and took it back to England; and Sir Walter himself learned to smoke and made smoking fashionable. The first time that Sir Walter’s servant saw him smoking, he thought his master was on fire; so what did he do but bring a big bucket of water and throw it all over him! I wish that that bucket of water had settled the matter, so that Sir Walter had stoppedsmoking and had never taught anyone else to smoke. If it had, think how much money might have been put to better use, for smoking is a very costly habit. And it is not only wasteful of money, but, worse still, of health; for it is the cause of a great deal of poor health and disease.
Remember that you want the air you breathe perfectly fresh and clean and not spoiled and poisoned by tobacco smoke.
When I was little and playing with my brothers, I did not always do what they wanted. So they’d sometimes say, “We’ll put him in Coventry, then he’ll do it.” They did not reallyputme anywhere. They simply would not speak to me or answer anything I said. It was just as if I were entirely alone. Of course it was a quick way to make me ready to take my part in the game again.
How do you think you would feel if you never, never could speak to anyone, and no one could speak to you? What a quiet world we’d have! Almost every day I meet a boy who can’t hear and can’t speak. How does he ask for things? He makes letters and spells words with his fingers, and his friends watch his fingers and read whathe says. Is that the way you do? “No, indeed,” you say, “I talk.” “What do you talk with?” “I talk with my mouth.” Yes, that’s true enough; but if you did not use something besides your mouth, you’d never make a sound.
Where does the sound come from? Feel gently with your finger and thumb along the front of your neck. Do you find something harder than the rest of your throat? That is the large tube called yourwindpipe. Do you feel a ridge sticking out from this? Now sing or talk a little. You can feel the ridge move up and down, and the sound thrill in it. That is where the sound comes from. That is your voice-and-music box, orlarynx.
You have seen the little red rubber balloons, haven’t you? You blow into them until they are big and round; and then, when you take your mouth away, out comes the air, making a squawking or whistling sound. Now, if you look closely at the mouthpiece, you see a tiny piece of rubber tied across it. The air rushing past this rubber is what makes your balloon sing.
Your own music box is made on the same plan. When you breathe out, the air is pushed from your lungs up the pipe that we call the windpipe. In the upper part of this is the little box, acorner of which you can feel with your thumb and finger. Across the box, inside, are stretched two folds of skin and muscle, just as the rubber is stretched across the opening of the balloon. Whenever you like, you can blow out your breath between these folds of skin in your voice box. Blow it out in one way, and what happens? You are singing. Blow it out in another way, and you are talking; in still another way, and you are just making a noise—perhaps mewing like a kitten, or neighing like a horse. If you pull these folds of skin close together, you can close your windpipe and “hold your breath.” A cough is made by filling your chest with air, holding the folds close shut, and then suddenly “letting go.” How many sounds you can make from one tiny music box! Of course the muscles of the mouth and throat, and the teeth and the tongue all help the voice box as much as they can.
One of the best ways to keep your voice clear and strong is to dash cold water every morning on your throat and chest, then to rub with a coarse towel till your skin is pink and warm. Gargle your throat with cold water if your voice is husky. Singing is very good for you, too; but don’t try to sing too hard. Sing easily and gently, and see how many words you can sing withouttaking a breath. That is good for the lung-bellows as well as the voice box. Always sing in fresh air, but not in cold air.
When you talk, try to make all the words clear and distinct; open your mouth and let the sound out. Once I had a big grown boy in one of my classes who did not open his lips properly when he spoke. So I asked him to prop his mouth open with a piece of stick and then talk. I made him do it until he learned to speak much more clearly. A famous Greek orator, named Demosthenes, who had a habit of mumbling his words, trained himself to speak clearly by putting pebbles in his mouth and then reciting in a loud voice.
When you want your voices to sound pleasant,—and that is always, of course,—you must call on your brain to help. That is your thinking machine. Always think twice before you let anything unpleasant or unkind come out of your voice box. How happy we could make everyone about us if we followed this rule!
Suppose, as you are walking home from school to-day, you are about to cross the street when you see an automobile coming very fast. What do you do? You stop, of course; wait for it to goby, and then start on again. Why do you stop? “Why,” you say, “if I didn’t, the automobile might run over me.” Something of that sort would just flash through your mind, wouldn’t it, in the very same second that you first saw the automobile coming. Now, as you know, you think with your brain. But what was it this time that set your brain to thinking? “Nothing,” you say, “I just saw the automobile coming.” And that is true in a way: you didn’t need anything more than your eyes to tell you.
But how did your eyes get the message to your brain, and how did your brain tell your legs to stop walking? We must have in our bodies a kind of telephone system. And that is, in fact, just what we have. Ourbrainis our “central office”; and ournervesare the wires, running from all parts of our body to the brain, carrying messages back and forth.
An old man and an old woman lived out on the very edge of a little town. One day their house caught fire and was blazing away before they noticed it. They rushed to their neighbor’s telephone and rang up “Central” to tell her to “phone” for the firemen and hose cart.Kling a-ling-a-ling!went their bell, but no “Central” answered; and while a man was running to townto get the firemen, the fire got such a good start that the house burned down.
You can see from this why we need a central office in good working order, when we use the “phone.” All the wires run into the one building, and there must be some one there to receive calls and see that they are sent out to their proper places. In this case, you see, “Central” should have been at her post to see that the message went on to the engine house, and then the fire would have been put out “double-quick.”
The “central office” of our Body Telephone System is just as important and just as necessary to keep in good working order. It would be very little use to have even the keenest of eyes and the sharpest of ears, with the readiest of nerve wires to carry their messages into the center of the body, unless we had someorgan, or headquarters, there for switching the messages over to the nerves running to the right muscles to tell them what to do. If the brain-“Central” should fail in its duty, or get out of order, then the body would be in serious trouble at once.
Every day we read in the papers of accidents because somebody didn’t think, as well as see or hear. People see cars and automobiles coming, but don’t give them a thought and so arerun down and hurt. They hear the whistle of the engine at the crossing, but drive on just the same, without seeming to have heard it at all. They are absent-minded; the operator in the “central office” seems to be off duty, or busy about something else. But if we are going to get on in this world of cars and automobiles and all sorts of unexpected things, we must always “have our wits about us,” as the saying goes, ready to send the messages out to the muscles in our legs and arms and fingers just as soon as any one of our “Five Senses” “rings up” the “Central” in our brain.
Our body wires do not look at all like telephone wires; and the brain, if you could see it, would never suggest to you a central office.
The nerves are fine white cords, the smallest ones finer than a hair, and the largest so big and strong that you could lift the body by it; and their branches run all over the body, to the muscles and the blood tubes and the skin and all the other parts, as the picture shows. You have already read how the skin can tell you when you feel warm and when you feel cold and when something hurts you.
The brain is a soft wrinkled mass, partly gray and partly white. It is in the head; and becauseit is very soft and easily hurt, Mother Nature has put around it a strong wall, or shell, of bone—theskull, or brain box. Feel your head and see how very hard this bone is. Solomon, the Hebrew poet-king, called it the “golden bowl.” I suppose he called it a “bowl” because it is round like one, and “golden” because it is so precious. People do not often grow well again if the “golden bowl” is broken or even cracked.
A diagram of the nerves from the brain through the upper body.THE NERVOUS SYSTEM—OUR BODY TELEPHONEThe picture shows the brain, or “Central,” and the thick nerve cord that runs down through the backbone, and the principal nerves of the back and the arms.
THE NERVOUS SYSTEM—OUR BODY TELEPHONE
The picture shows the brain, or “Central,” and the thick nerve cord that runs down through the backbone, and the principal nerves of the back and the arms.
The bignerve cable, called thespinal cord, that connects the brain with the rest of the body, and carries all the messages backward and forward, runs down the back and is protected by the backbone, orspine, whichis hollow, so that the cord can run down through it. This backbone is jointed together so beautifully, too, that you can bend your back about and stoop over, and carry heavy weights on your back, and yet the bony tube still protects the cord inside. Solomon calls this the “silver cord,” because it is so white and shiny that it looks like silver. You see, our bodies are full of beautiful as well as wonderful things.
Probably sometime when your teacher has asked you to recite a poem you have all learned, someone in the class has answered, “I don’t remember it,” or has stood up and recited the first few lines and then stopped, and thought, and finally had to say, “I can’t go on.”
Now what is the matter with this boy, or girl? He looks bright enough, and you will probably remember that he was in the class when you learned the poem. “Oh,” you say, “the poem didn’t stay in his head.” No, it didn’t “stick” in his memory; but why didn’t it?
Some of the messages that the Five Senses carry to the brain are answered at once, as when we move away from danger, or reach out our hands and help ourselves to butter, or take off a shoe to shake out a pebble. But there are other messages that do not call for an immediatereply, and are just stored away for future use in the big “central office” of our Body Telephone, in what we call ourmemory. And later, when the proper message is sent in by our eyes or ears, or other sense organs, which reminds us of this message which they sent before, perhaps several weeks, months, or even years ago, it wakes up the old message stored away in the memory, and we say we “remember” what happened to us, or what we learned at that time.
So, when your teacher asks you to recite a certain poem, and your ears hear the title or the first line, you recall the rest of the verses and the lesson about it. How many things does the word “Christmas” wake up out of your memory? or the sight of soldiers marching? or the first taste of strawberries in May?
You think about a great many things that you neverdo. Really you are thinking almost all the time you are awake. And besides the messages that “Central” just stores away for future use, there are a great many messages being carried back and forth along the “telephone system” all the time, that you don’t keep track of at all—the messages that keep the stomach and the heart and the lungs and everything in your body working together properly.
How are we to take care of the telephone lines and “Central” of ournervous system? Whatever you do to build up and help the other parts of the body will help your brain tofeelandthinkandremember; and will help your muscles and nerves to answer promptly and truly whatever the message may be. Plenty of good food, plenty of sleep and fresh air, plenty of play, will keep your nerves and brain healthy and growing.
How many times have you been absent this term? No oftener than you were obliged to be, I am sure; for it’s almost as bad as being “put in Coventry” to come back and hear about the good time the rest of the class have been having, and feel that you “weren’t in it.” Of course, sometimes, when you are not well, you have to be absent; it is best that you should be. But it is better still to know how to keep well, so you won’t have to be absent, and won’t have to miss any good times in work or play all your life.
You remember that all the parts of your body are fed and ventilated by the blood, which is pumped to them from the heart. So long as this blood is pure and has plenty of oxygen in it, it does good to every part of the body to which it comes. But the moment that poisons and dirt and waste begin to pile up in the blood, then the blood that comes to the different parts of the body may be poisonous to them, instead of helpful.
Such poisons in the blood are particularlyharmful to the nerves and the brain, because these are among the most delicate and sensitive of all the structures in the body.
Often we think of the body as a beautiful house. Now a house does not look very beautiful when it has dust and crumbs on the floor, buckets of greasy dishwater in the kitchen, and smoke from the furnace in the air! You could not live in such a place. No, the smoke must go out up the chimney, the dust and crumbs must be swept away, the dirty water must be drained off in pipes; the house must be not only cleaned, but kept clean all the time. This is true of your body, too.
Now Mother Nature sends the smoke from the body out through the lungs, and the crumbs and solid dirt down and out by means of the food tube. But the waste water—how does she get rid of that? The waste water, you remember, is in the blood vessels, mixed with the blood. How does she get it out of the blood? She sends it through three magic cleaners, or strainers,—theskin, theliver, thekidneys.
That the skin is a strainer, you already know; for you know how the skin lets out the waste water in perspiration, or sweat, and how important it is that we keep the little holes of thestrainer open and clean. And you know, too, that most of the water that passes out of the body goes first to the kidneys.
The liver, however, is the largest cleaning machine of all and has to work very hard. The blood comes to it full of foods and poisons. This wonderful cleaner picks out the food it needs and takes up many of the poisons, too. “What does it do with the poisons?” you ask. Some of them it changes into good food, and others it makes harmless and sends away down the food tube in a fluid calledbile. If we are strong and healthy, the liver has the power to kill many of the disease germs that get into the body. That is why sometimes, when you have had a chance to take mumps or grippe or some other “catching” disease, you don’t take it. Your liver kills the germs, or seeds. See how carefully Mother Nature has planned that we may be clean inside as well as outside.
A diagram of the liver, stomach and colon.THE POSITION OF THE LIVERCompare this with the diagram onpage 26, and see how the liver partly overlaps the stomach.
THE POSITION OF THE LIVER
Compare this with the diagram onpage 26, and see how the liver partly overlaps the stomach.
But you must not over-work your liver. If you do, it may become too tired to do anythingat all. Then all these poisons will spread through the body; the skin and the whites of the eyes will grow yellow, and you will be what is called “bilious.” When this happens, the poisons go to your brain, too, and make you feel sad; your tongue looks white instead of pink, and you have a disagreeable taste in your mouth. Your happiness depends very much on your liver.
“How shall I keep my liver rested and in good working order?” By eating only sound, wholesome, pure food, and avoiding dirty milk; by going to the toilet regularly every morning after breakfast; by keeping your windows open and avoiding the poisons and disease germs in foul air. Then, if you run and play and work out of doors, so that the muscles move a great deal and you breathe in plenty of oxygen to keep the body fires burning briskly, that will help a great deal.
Last summer up in the mountains I saw a big log close by the path. It had been sawed across so that the end was smooth. It was brown and weather-stained, so of course I knew that it had lain there a long time. How surprised I was to see a pile of fine fresh sawdust on the ground beside it. As I came nearer, I saw piece after piece of sawdust dropping, dropping, dropping, one after the other, from a hole in the log. Ilooked into the hole, and what do you think I saw? Hundreds of little brown ants, busy as could be carrying the sawdust, throwing it out, and then scurrying back to get some more. Several feet inside the log, other ants were cutting the sawdust, hollowing out the rooms of their house; and in another part others were getting food for the workers, and still others taking care of the baby ants. They were all helping one another, and whatever one ant did helped all the rest. That is the way with the parts, or organs, of the body. When one part works well, it helps all the rest; when one squad of tiny cells in the muscles or liver or heart is doing its duty, like the little ants, it helps all the other cell-workers in the body to keep healthy.
If you eat proper food, you help not only your stomach but your liver, too; for it has not so many poisons to get rid of. While you are helping your stomach and your liver, you are helping your heart and your brain, and so on. So what you do to help one helps all.
There are, however, some poisons that the liver cannot get rid of; but these the skin or the kidneys carry away. Have you ever seen kidney beans? The bean is the shape of a kidney. Thekidneys are in the middle of your back, packed close to your backbone, on a line with your waist. This is a picture of them. Do you see the little tubes leading down from the kidneys, carrying the waste water and poison down into a kind of bag? The walls of this bag, called thebladder, will stretch, and it will hold about a pint of waste water. From the bladder a tube carries the water down out of the body.
A diagram of the kidneys, ureter and bladder.THE KIDNEYS AND THE BLADDERThe large tubes are the artery and the vein that carry blood to and from this part of the body.
THE KIDNEYS AND THE BLADDER
The large tubes are the artery and the vein that carry blood to and from this part of the body.
You can help your kidney-strainers by emptying your bladder at certain times each day. Some children have to empty the bladder much oftener than others, but most children can form what we callregular habitsabout it, by trying to do it at the same times each day. If you are quite strong, five times a day is often enough: when you first get up, at recess, at noon, at four o’clock, and at bedtime. Many children do it much oftener than this; but as they grow older and the muscles grow stronger, they slowly outgrow this trouble, if they try to form the right habits.
There are many diseases of the kidneys; for,like the liver, they are sometimes over-worked and do not carry the poisons from the body. You are helping your kidneys when you drink plenty of fresh clean water every day, and also when you play or work hard enough to get into a good perspiration; for, as perspiring carries out some of the poisons, it leaves less for the kidneys to pour out. You ought to get into a good perspiration at least once every day, or better, three or four times, if you wish to keep healthy. The Bible says, “In the sweat of thy brow shalt thou eat bread”; and you must earn health and happiness at the same price.
You have seen that sitting or sleeping in rooms where the air is bad, or eating the wrong kind of food, or working after you are badly tired, will poison your blood and hinder the proper working of that beautiful machine, your body. These poisons are made inside your body, and you can prevent them by living healthfully and wholesomely. But there are other poisons, which may get into the blood from outside the body; and while it is best for you not to think too much about these, or to worry over dangers that may never come, yet it is well to know just enoughabout some of them to be able to keep out of their way, as far as possible.
The most dangerous form of poisons from outside the body are those made by the germs of some rather common diseases, which, because you can “catch” them from some one else who has them, are called “catching,” orinfectious, orcontagious.
Some of the germs of these “catching” diseases, like the germs of typhoid fever, of which we have spoken in connection with our drinking water, are carried in the water or milk that we drink, or upon the food that we eat; and one of the worst carriers of germs is the ordinary household fly.
Not so very many years ago, people did not know thatdirt makes people sick. You see, they did not know anything about the disease seeds (germs) that grow so fast in dirt. They did not like to have flies about, because flies look so dirty and bite people and crawl over things and spot them. But nowadays, we will not have flies about because we know that they have been in dirty places where disease germs live, and that one little fly can carry thousands and thousands of these germs on his feet.
Have you ever looked at a fly through a magnifyingglass or under a microscope? If you haven’t, try it sometime. You will see that his legs are covered with little hairs; and it is on these little hairs that the germs lodge. They are too small for you to see except with a very powerful glass; but scientists have proved that they are there, and they have found that there are always typhoid germs among them.
A diagram of a very large version of a house fly.THE COMMON HOUSE FLYAs he appears through a magnifying glass.
THE COMMON HOUSE FLY
As he appears through a magnifying glass.
Did you ever see a fly wipe his feet before he came into the house? No, indeed; and he goes anywhere he pleases, over the bread and into the cream. Yet he was born in dirt and bred in dirt, and he lives in dirty places all the time he is not crawling over your clean things and spoiling them.
Flies are hatched from eggs; and these eggs can hatch only in piles of dirt, such as heaps of manure, or places where garbage and scraps from the house are dumped or thrown. We call the common fly the "domestic" or "house" fly, because he lives only in the neighborhood of houses and barnyards where heaps of manure and piles of dirt are allowed to gather.
When the fly first hatches from the egg, it is a little white, wriggling worm called amaggot, like those that some of you may have seen in decaying meat or fish or cheese. The maggots must have decaying substances to eat and live upon while they are growing, and this is why the eggs are laid in manure heaps and garbage piles.