Most of the fish used as food come from the ocean. In this, and in most other countries, there are many men who do nothing but fish, in order that other people may be supplied with this sort of food. They do not depend upon hook and line alone, but use nets also. Nets are great sacks made of cord, knotted or woven together in such a way as to leave spaces or _meshes_. These meshes are not big enough to allow large fish to escape. Sometimes the fishermen go out in rowboats some distance from shore and then throw the net into the water. Corks or floats keep the upper edge of the net near the surface, while weights hold the lower edge on the bottom. Ropes are fastened to each end, and so it is drawn toward the shore. How the fishermen wish that they could see to the bottom of the restless water and know what their harvest is to be! When the boats have almost reached the shore, horses are sometimes driven into the water and hitched to the ropes. At last the net is dragged out upon the sands and the uncertainty is past. [Illustration: FIG. 18.--Drying Nets.] Look! Within the folds of the net is a countless number of fishes, each jumping, squirming, wriggling, trying to get back to its ocean home. They are of many sizes, shapes, and colors. Those not good for food, together with the smallest ones, are thrown back into the water. Sometimes a net called a "dip-net" is dropped from a fishing schooner and drawn about a "school" of fish. I have seen many barrels of fish brought up at one time in this way. The fishermen keep a close watch for the appearance of these "schools," you may be sure. Whales and dolphins pursue them, and gulls and cormorants circle overhead, for they, too, are fishers. Their appearance helps the men to tell where the "schools" are. There is a great rush for the fishing grounds when they are sighted. The white-sailed schooners skim over the waters almost like a flock of birds. [Illustration: FIG. 19.--A Fishing Schooner.] Large quantities of fish are caught by a method called _trawl fishing_. This may be carried on miles from the shore. How do you suppose it is done? To a very long and strong line, many shorter ones, each with a hook at the end, are attached. These lines, to which large buoys are fastened, are left in the water for several hours, and then fishermen in flat-bottomed boats called _dories_ row out from the schooner and examine them. The lines are then reset and the fish taken to the schooner to be dressed. This is a common method of catching codfish, which is carried on during summer and winter alike. Storms and fogs are likely to occur while the men are out in their little boats, making their work full of danger as well as of hardship. [Illustration: FIG. 20.--Splitting Codfish.]