He is so heavy that if the bones under his feet were not covered with a thick pad, he would jar the bones every time he put his foot down, even if the ground were not very hard.
In the same way the camel"s padded foot is very useful to him even when he is not in the desert, but on hard ground; for he too is rather heavy, though of course not so heavy as an elephant.
[Ill.u.s.tration: Sand Storm in the Desert]
There are other reasons why no other animal could cross a desert as easily as a camel. In the desert there are sometimes fierce storms; and as it is all sand there, the strong wind blows the sand about in every direction. As there is no place there where one could get away from the sand, any other animal would soon have a lot of sand blown into his nostrils; then he would be choked. But a camel"s nostrils are made differently, so that whenever he likes he can _close his nostrils_, as easily as you can close your mouths, and that keeps away the sand. The camel is clever enough to lie down on the ground when a storm is blowing, and to lay his neck and chin along the ground; then his nose is quite close to the ground, where the storm is not quite so fierce as in the air.
Of course, when he wants to breathe, he opens his nostrils a tiny bit to take in a little air; then he closes the nostrils again, and holds his breath for a little while. He has to keep on doing that as long as the storm lasts.
But what does his master do, who has been riding on his back? He cannot close his nostrils; so the only thing he can do is to get off the camel and huddle against the camel"s body on the side far from the wind; then he brings his face quite close to the ground and holds his nose with his hand. When he wants to breathe, he opens his fingers just enough to make a slit and let the _air_ in, but not enough to let the _sand_ in.
There is another reason why no other animal could cross a desert: his eyes would be blinded by the fierce glare of the sun. But a camel has very _thick hair on his eyebrows_, which hang over the eyes, and keep off the fierce rays of the sun. His eyelashes also are very thick, and help to keep off the sun in the same way.
But there is a still more wonderful reason why no other animal, except a camel, could cross a desert. In a desert water is very scarce, and a traveler crossing a desert on a camel may not find any water for a whole week. Of course, he carries on his saddle half a dozen bottles of water to drink; but after drinking some of the water each day, he has not much to spare for the poor camel. Then what is the poor camel to do?
Of course, you may say that his master should carry more water for the camel to drink. But the load of goods which the camel has to carry is already so heavy that there is not much room for any more water. Then what _can_ the poor camel do?
Why, he _carries his own drinking water_, not in the load on his back, but _inside his stomach_! Is not that a wonderful thing? His stomach is made differently from that of any other animal. The stomach of any other animal, Or even a man"s stomach, is so made that the water drunk at any time is all used up in the next few hours; that is why any other animal, or even a man, has to have another drink after those few hours.
But a camel"s stomach is so made that it has one big place for food and drink like the stomach of any other animal, but it also has many smaller places arranged all around the stomach; these smaller places are just like bottles, and are called _cells_.
So when a camel takes a good long drink, the big place in the middle of the stomach takes in the water first; then as he drinks more and more, the bottles or cells all around begin to get filled also. And the wonderful thing is that as soon as each cell is full, its mouth closes up by itself! In that way, if the camel drinks long enough, all the cells get full, one by one, and then have their mouths closed up.
When a camel is about to start on a long journey through the desert, he takes a very long drink, till he _feels_ that he cannot drink any more; then he _knows_ that all the bottles or cells inside are quite full, as well as the big place in the middle of his stomach. Now he is ready to cross the desert.
After many hours all the water in the big place in the middle of the stomach gets used up. Then what happens? Why, one of the bottles inside opens its mouth by itself, and pours the water into the stomach! And after many hours more, when _that_ water has also been used up, the _second_ bottle opens its mouth and pours the water into the stomach. In this way all the bottles or cells inside the camel one by one pour their water into the stomach from day to day, whenever the camel feels thirsty. Is not that most wonderful?
And there is yet another very wonderful thing about the camel. His hump! It is just as wonderful whether it is one hump or two humps. I shall tell you.
The camel"s hump is his _store of food_! Yes, just as he carries his own drinking water inside his stomach, so he also carries his own store of food in his hump.
This is how he does it:
When the camel is quite well and strong, if he eats any food which is a little more than he actually needs for his hunger, that food after a while goes to his hump and helps to make it bigger. In this way the hump becomes a store of all the extra food that he has eaten. Then, on going on a long journey through the desert, if the camel has nothing to eat and begins to feel hungry and weak, a little of the hump is used up to give him strength, just as if he were to eat a meal. In this way he can go for many days without food, but of course his hump will get smaller and smaller.
[Ill.u.s.tration: Crossing the Desert with Camels]
But his master does not actually take him through the desert without giving him _any_ food or drink; in fact he always gives the camel some of the figs and dates which he takes with him for his own meals, and also some of the drinking water which he carries on his saddle. But if it did happen that his master had no food or drink to spare, the camel could still live for several days, using his hump for food, and the water in the cells of his stomach for drink.
The camel can do yet another wonderful thing. He can tell a long way off when he is coming to a place where there is water. In the desert, after going over sand and sand for many days, a traveler sometimes finds a beautiful place called an _oasis_. It is just like a lovely little garden right in the middle of the desert, with a spring of water, and several fig trees, date trees, and other palm trees growing all around the pool.
When a traveler is crossing the desert and sees nothing but sand for several days, it sometimes happens that his camel suddenly stops, stands quite still for a minute, raises his head, and sniffs the air.
Then he turns a little to the right or to the left, and begins to run straight that way. His master may look ahead very hard, but he will see nothing but sand and sand, as before.
But the camel, by just sniffing the air, has found out that there is an oasis within reach, though it is still too far away for him to see it. Then he runs on most gladly, and comes to the oasis in an hour, so that he and his master can rest there for some time, and drink from the pool, and eat the figs and dates growing on the trees.
Of course, the camel can also eat the leaves of the trees; in fact, when he is not in the desert, but just in the ordinary country, he usually eats from the shrubs and bushes, and gets figs and dates only as a dainty, just as you sometimes have ice cream. The camel with two humps will gladly eat many more things than the camel with one hump.
In fact, when he is hungry, he will eat not only any kind of vegetable, but also meat. He has even been known to chew up and eat bones, blankets, and leather! And he is perhaps the _only animal that will drink salt water_; for the country in which the Two-Humps camel lives has several lakes, the water of which is bitter and salty.
So you see how useful an animal the camel is, whether he has one hump or two humps. He is so useful that people have been saying for a long time that camels should be brought into America, where there are several deserts in the western states. In fact, a strange thing has already happened. The United States Government did bring a lot of camels for use in the western states several years ago, about the time when your grandfather was a boy.
But the people who can best manage such large animals as elephants and camels are the people who are born in the same countries as those animals and who understand their habits. And unluckily, when the camels were brought into America, n.o.body thought of bringing men also from those countries to manage the camels. So n.o.body seemed to know how to use these animals, and after a time they were turned loose in Arizona. The camels went into the deserts and forests there, and became quite wild, and to-day there are some of them in Arizona.
Now, do you not think it would be a good idea to get a few men from those countries and learn from them how to manage camels? Then the camels of Arizona also could be used in crossing the deserts there, where there are no railroads.
Besides being the only animal that can cross the desert, the camel is different from any other four-legged animal even in the way he walks.
You have seen how a horse walks? When his left foreleg is lifted off the ground, his right hind leg is also lifted off the ground; then in the next step, when his right foreleg is lifted off the ground, his left hind leg is also lifted off the ground. That means that the two legs which move at the same time are those placed at the _opposite corners_ of his body. But when a camel walks, he lifts the two legs on the _same side_ of his body at the same time. And when he takes the next step, he lifts the two legs on the other side of his body.
Now, my dear, I have told you many things about the camel which are different from anything in any other animal. So, before I close this chapter, I want you to remember these things about the camel:
1. His _foot_ is _padded_ in such a way that he can walk or run on sand.
2. He can _close_ his _nostrils_ to keep out the sand in a storm.
3. His _thick_ and bushy _eyebrows_ and _thick eyelashes_ keep the glare of the sun from his eyes.
4. His stomach has many _cells_ like bottles, in which he can _store up water_.
5. He can _store up food_ in his _hump_.
6. He walks by moving both legs on the _same side_ of his body at the same time.
In another chapter I shall tell you about an animal that can also do one of these things: he can _store up food_ in his body, though in a different way. That animal is the _bear_. He sleeps through the whole winter, and has to have a store of food somewhere in his body to last all that time.
CHAPTER XII
The Camel and the Thief
Now I shall tell you a story about a camel and a thief. It is a true story, and happened many, many years ago. The story shows what we can learn by watching the animals.
Once upon a time, a traveler was going on foot across the country. In his belt he had a purse full of money. One day, as the sun began to get hot, he lay down on the gra.s.s under a tree near the roadway, and fell asleep.
After a few hours he woke up, and what was his surprise to find that the purse was gone! While he was asleep, somebody had quietly stolen his purse and gone away.
The traveler ran to the nearest village, and there told the police about it. Now, among the police there was a very clever man, and the police brought him with them to the place where the money had been stolen. The clever man looked all around the place very carefully to see if he could find any marks on the ground. On the gra.s.s near the tree he found no marks; in fact, if a person walks on the gra.s.s just once or twice it does not leave any mark. But on the roadway near by he found footprints.
"They are a camel"s footprints," he said, looking at the marks carefully. "And the marks of all the four feet are not quite the same.
Three of them are quite deep and clear; but the fourth one is very faint."
He followed the camel"s footprints along the road for a long time. But now and again he stopped and looked at the shrubs and bushes which grew here and there, on both sides of the road.
"h.e.l.lo, that is strange!" he suddenly said. "The camel has eaten from the bushes and shrubs here and there on the left side of the road, but he hasn"t eaten at all from those on the right side of the road."
He went on for some time longer, then suddenly stopped to look at the road where the camel had walked.