Fables for Children, Stories for Children, Natural Science Stories Part 30

HARES AND WOLVES

The hares feed at night on tree bark; the field hares eat the winter rye and the gra.s.s, and the thres.h.i.+ng-floor hares eat the grain in the granary. Through the night the hares make a deep, visible track through the snow. The hares are hunted by men, and dogs, and wolves, and foxes, and ravens, and eagles. If a hare walked straight ahead, he would be easily caught in the morning by his tracks; but G.o.d has made a hare timid, and his timidity saves him.

A hare goes at night fearlessly through the forests and fields, making straight tracks; but as soon as morning comes and his enemies wake up, and he hears the bark of dogs, or the squeak of sleighs, or the voice of peasants, or the cras.h.i.+ng of a wolf through the forest, he begins to toss from side to side in his fear. He jumps forward, gets frightened at something, and runs back on his track. He hears something again, and he leaps at full speed to one side and runs away from his old track. Again something makes a noise, and the hare turns back, and again leaps to one side. When it is daylight, he lies down.

In the morning the hunters try to follow the hare tracks, and they get mixed up on the double tracks and long leaps, and marvel at the hare's cunning. But the hare did not mean to be cunning. He is merely afraid of everything.

THE SCENT

Man sees with his eyes, hears with his ears, smells with his nose, tastes with his mouth, and feels with his fingers. One man's eyes see better, another man's see worse. One hears from a distance, and another is deaf. One has keen senses and smells a thing from a distance, while another smells at a rotten egg and does not perceive it. One can tell a thing by the touch, and another cannot tell by touch what is wood and what paper. One will take a substance in his mouth and will find it sweet, while another will swallow it without making out whether it is bitter or sweet.

Just so the different senses differ in strength in the animals. But with all the animals the sense of smell is stronger than in man.

When a man wants to recognize a thing, he looks at it, listens to the noise that it makes, now and then smells at it, or tastes it; but, above all, a man has to feel a thing, to recognize it.

But nearly all animals more than anything else need to smell a thing. A horse, a wolf, a dog, a cow, a bear do not know a thing until they smell it.

When a horse is afraid of anything, it snorts,--it clears its nose so as to scent better, and does not stop being afraid until it has smelled the object well.

A dog frequently follows its master's track, but when it sees him, it does not recognize him and begins to bark, until it smells him and finds out that that which has looked so terrible is its master.

Oxen see other oxen stricken down, and hear them roar in the slaughter-house, but still do not understand what is going on. But an ox or a cow need only find a spot where there is ox blood, and smell it, and it will understand and will roar and strike with its feet, and cannot be driven off the spot.

An old man's wife had fallen ill; he went himself to milk the cow. The cow snorted,--she discovered that it was not her mistress, and would not give him any milk. The mistress told her husband to put on her fur coat and kerchief,--and the cow gave milk; but the old man threw open the coat, and the cow scented him, and stopped giving milk.

When hounds follow an animal's trail, they never run on the track itself, but to one side, about twenty paces from it. When an inexperienced hunter wants to show the dog the scent, and sticks its nose on the track, it will always jump to one side. The track itself smells so strong to the dog that it cannot make out on the track whether the animal has run ahead or backward. It runs to one side, and then only discovers in what direction the scent grows stronger, and so follows the animal. The dog does precisely what we do when somebody speaks very loud in our ears; we step a distance away, and only then do we make out what is being said. Or, if anything we are looking at is too close, we step back and only then make it out.

Dogs recognize each other and make signs to each other by means of their scent.

The scent is more delicate still in insects. A bee flies directly to the flower that it wants to reach; a worm crawls to its leaf; a bedbug, a flea, a mosquito scents a man a hundred thousand of its steps away.

If the particles which separate from a substance and enter our noses are small, how small must be those particles that reach the organ of smell of the insects!

TOUCH AND SIGHT

Twist the forefinger over the middle finger and touch a small ball with them, so that it may roll between the two fingers, and shut your eyes.

You will think that there are two b.a.l.l.s. Open your eyes,--and you will see that it is one ball. The fingers have deceived you, but the eyes correct you.

Look (best of all sidewise) at a good, clean mirror,--you will think that it is a window or a door, and that there is something behind it.

Touch it with a finger,--and you will see that it is a mirror. The eyes have deceived you, but the fingers correct you.

THE SILKWORM

I had some old mulberry-trees in my garden. My grandfather had planted them. In the fall I was given a dram of silkworm eggs, and was advised to hatch them and raise silkworms. These eggs are dark gray and so small that in that dram I counted 5,835 of them. They are smaller than the tiniest pin-head. They are quite dead; only when you crush them do they crack.

The eggs had been lying around on my table, and I had almost forgotten about them.

One day, in the spring, I went into the orchard and noticed the buds swelling on the mulberry-trees, and where the sun beat down, the leaves were out. I thought of the silkworm eggs, and took them apart at home and gave them more room. The majority of the eggs were no longer dark gray, as before, but some were light gray, while others were lighter still, with a milky shade.

The next morning, I looked at the eggs, and saw that some of the worms had hatched out, while other eggs were quite swollen. Evidently they felt in their sh.e.l.ls that their food was ripening.

The worms were black and s.h.a.ggy, and so small that it was hard to see them. I looked at them through a magnifying-gla.s.s, and saw that in the eggs they lay curled up in rings, and when they came out they straightened themselves out. I went to the garden for some mulberry leaves; I got about three handfuls of leaves, which I put on my table, and began to fix a place for the worms, as I had been taught to do.

While I was fixing the paper, the worms smelled their food and started to crawl toward it. I pushed it away, and began to entice the worms to a leaf, and they made for it, as dogs make for a piece of meat, crawling after the leaf over the cloth of the table and across pencils, scissors, and papers. Then I cut off a piece of paper, stuck holes through it with a penknife, placed the leaf on top of it, and with the leaf put it down on the worms. The worms crawled through the holes, climbed on the leaf, and started to eat.

When the other worms hatched out, I again put a piece of paper with a leaf on them, and all crawled through the holes and began to eat. The worms gathered on each leaf and nibbled at it from its edges. Then, when they had eaten everything, they crawled on the paper and looked for more food. Then I put on them new sheets of perforated paper with mulberry leaves upon them, and they crawled over to the new food.

They were lying on my shelf, and when there was no leaf, they climbed about the shelf, and came to its very edge, but they never fell down, though they are blind. The moment a worm comes to an edge, it lets out a web from its mouth before descending, and then it attaches itself to it and lets itself down; it hangs awhile in the air, and watches, and if it wants to get down farther, it does so, and if not, it pulls itself up by its web.

For days at a time the worms did nothing but eat. I had to give them more and more leaves. When a new leaf was brought, and they transferred themselves to it, they made a noise as though a rain were falling on leaves,--that was when they began to eat the new leaf.

Thus the older worms lived for five days. They had grown very large and began to eat ten times as much as ever. On the fifth day, I knew, they would fall asleep, and waited for that to happen. Toward evening, on the fifth day, one of the older worms stuck to the paper and stopped eating and stirring.

The whole next day I watched it for a long time. I knew that worms moulted several times, because they grew up and found it close in their old hide, and so put on a new one.

My friend and I watched it by turns. In the evening my friend called out:

"It has begun to undress itself,--come!"

I went up to him, and saw that the worm had stuck with its old hide to the paper, had torn a hole at the mouth, thrust forth its head, and was writhing and working to get out, but the old s.h.i.+rt held it fast. I watched it for a long time as it writhed and could not get out, and I wanted to help it. I barely touched it with my nail, but soon saw that I had done something foolish. Under my nail there was something liquid, and the worm died. At first I thought that it was blood, but later I learned that the worm has a liquid ma.s.s under its skin, so that the s.h.i.+rt may come off easier. With my nail I no doubt disturbed the new s.h.i.+rt, for, though the worm crawled out, it soon died.

The other worms I did not touch. All of them came out of their s.h.i.+rts in the same manner; only a few died, and nearly all came out safely, though they struggled hard for a long time.

After shedding their skins, the worms began to eat more voraciously, and more leaves were devoured. Four days later they again fell asleep, and again crawled out of their skins. A still larger quant.i.ty of leaves was now consumed by them, and they were now a quarter of an inch in length.

Six days later they fell asleep once more, and once more came out in new skins, and now were very large and fat, and we had barely time to get leaves ready for them.

On the ninth day the oldest worms quit eating entirely and climbed up the shelves and rods. I gathered them in and gave them fresh leaves, but they turned their heads away from them, and continued climbing. Then I remembered that when the worms get ready to roll up into larvae, they stop eating and climb upward.

I left them alone, and began to watch what they would do.

The eldest worms climbed to the ceiling, scattered about, crawled in all directions, and began to draw out single threads in various directions.

I watched one of them. It went into a corner, put forth about six threads each two inches long, hung down from them, bent over in a horseshoe, and began to turn its head and let out a silk web which began to cover it all over. Toward evening it was covered by it as though in a mist; the worm could scarcely be seen. On the following morning the worm could no longer be seen; it was all wrapped in silk, and still it spun out more.

Three days later it finished spinning, and quieted down. Later I learned how much web it had spun in those three days. If the whole web were to be unravelled, it would be more than half a mile in length, seldom less.

And if we figure out how many times the worm has to toss its head in these three days in order to let out all the web, it will appear that in these three days the worm tosses its head 300,000 times. Consequently, it makes one turn a second, without stopping. But after the work, when we took down a few coc.o.o.ns and broke them open, we found inside the worms all dried up and white, looking like pieces of wax.