Many thrilling stories have been written about the dangers of whale-fishing. The perils and hardships of whaling expeditions are braved in order that we may be supplied principally with two things—whale-oil and whalebone. If you can learn what whalebone is, and what is its use, you will know a good deal about the habits of the whale itself.

The substance which we call whalebone is not true bone. It would be much more correct to call it whales' teeth, as it occupies the same position as teeth, and, in a measure, serves the same purpose. Moreover, the whale has a skeleton of true bones underlying its flesh, and serving as a framework for its huge, bulky body. These bones are very light and porous, and this is a great advantage to the whale, which spends most of its time floating upon the surface of the water without having to make much effort.

There are numerous kinds of whales, and they do not all yield the substance which we call whalebone. The sperm whale, or cachalot, has teeth in its lower jaw, and no whalebone whatever. The Greenland whale, on the other hand, which is the one most sought after for its oil, has no teeth, but abundance of whalebone, which hangs from the sides of its upper jaw.

In order to get some idea of what this whalebone is like as it hangs in the whale's mouth, we must try to picture what the whale itself is like. The largest of them grow to something like sixty feet in length. The head is unusually large, and forms about one-third of the whole body, and the inside of the mouth is about as large as a ship's cabin or a very small room. The strips of whalebone, which reach from the upper jaw to the lower one, must, therefore, be very large. The largest strips, which hang in the middle of the jaws, are rather like large planks, being from ten to fifteen feet long, and about twelve inches across at their widest part. They are thinner than planks, however, and perhaps we might better compare them to long and broad saw-blades. There are altogether about three hundred of these whalebone planks or blades in the whale's mouth. They are set transversely—that is to say, one narrow edge of each piece touches the tongue, while the other edge lies against the cheek or lip. They lie so close together that from the middle of the edge of one blade to the middle of the edge of the next the distance is less than an inch, and yet there is a space between them. The whole set extends like a huge grate round the whale's mouth, the bars of whalebone being long in the middle of the sides of the jaws, and growing shorter near the back and front.

Whalebone is very fibrous or stringy, and it splits very readily. The lower ends of the pieces in the whale's mouth are split and frayed into stiff bristles, and the inner edges are frayed in the same way, while the outer edges are made smooth, so that they do not hurt the inside of the animal's lips. The roof of the whale's mouth is covered with smaller pieces of whalebone hanging down like bristled quills. Many of these are only a few inches long, but they make the whole of the upper part of the whale's mouth rough and bristly.

The creature's tongue is an enormous one, often measuring six yards long and three yards wide. Its throat, however, is so small that sailors often say a herring would choke it. What can be the use of such a large mouth and tongue, and such large bars of whalebone to a creature which has so small a throat?

On the surface of the Arctic Sea, where the whale lives, there are swarms of living creatures. Some of these are jelly-fish, like those which are often left upon the sea-shore when the tide goes out. But one of the commonest of these lowly animals is a little soft-bodied creature about an inch and a half long, which moves along through the water with the help of two organs like wings or paddles. It is called the Clio borealis, and it is very rarely seen near the shore. It is upon these creatures that the whale feeds. Opening its mouth wide, it rushes through the sea, and takes in a crowd of these soft-bodied animals, along with the water in which they are swimming. Closing its mouth, it drives out the water through its plates of whalebone, and the little creatures are caught in the bristles as in a net. Its great tongue is lifted up, and crushes them all into soft pulp, which is easily swallowed, even down the whale's small throat.

Thus every part of the whale's mouth is altered to suit its strange mode of feeding. The hard teeth, which would be of no use for biting small pulpy animals, are done away with, and a new growth of whalebone appears, which is of the utmost service in catching the whale its food.

Whalebone has been used for many purposes. It is split up into little pieces, and used for light frameworks, which are required to be stiff, but, at the same time, elastic. It used to be used for the ribs of umbrellas and for ladies' hoops. It was also split very small and used for the bristles of brushes. But it is now becoming scarce, and other substances are generally used in its place.

W. A. Atkinson.