[Illustration: FIG. 2.--THE INVENTION OF THE CANOE.] [Illustration: FIG. 3.--THE RAFT--SHOWING ALSO EARLY USE OF THE SAIL.] [Illustration: FIG. 4.--A PRIMITIVE OARLOCK.] The canoe was one of the earliest of boats, but it is not in line with the later growth. The ancestry of the modern boat begins with the log and is traced through the raft rather than through the canoe. By lashing together several logs it was found that larger burdens could be carried. Therefore the boat of a single log grew into one of several logs--a raft (Fig. 3). By the time man had learned to make a raft he had learned something else: he had learned to row his boat along by pulling at an oar instead of pushing it along with a paddle. But in order to row there must be something against which the oar may rest; so the oarlock (Fig. 4) was invented. Rafts were used by nearly all the nations of antiquity. Herodotus, the father of history, tells us that they were in use in ancient Chaldea. In Figure 3 we have a kind of raft that may still be seen on some of the rivers of South America. Here a most important step in boat-building has been taken. A _sail_ has been hoisted and one of the forces of nature has been bidden to assist man in moving his boat along. The raft was bound to develop into the large boat. The central log was used as a keel and about this was built a boat of the desired shape and size. Stout timbers, called ribs, slanted from the keel, and on the ribs were fastened planks running lengthwise with the vessel. To keep out the water the seams between the planks were filled with pitch or wax. Thus the raft grew into a large spoon-shaped vessel (Fig. 5). The early boat was usually propelled by oars, although a single sail sometimes invoked the assistance of the wind. It had no rudder and no deck, and if there was an anchor it was only a heavy stone. [Illustration: FIG. 5.--"THUS THE RAFT GREW INTO A LARGE, SPOON-SHAPED VESSEL."] In the early history of the boat there was no such thing as a rudder. The oarsman had to steer his craft as best he could. With the appearance of larger boats, however, a steersman comes into view. He steers by means of a paddle held over the stern of the boat. Within historic times, probably about the time of Homer (1100 B. C.), the rudder appears as an oar with a broad blade protruding through a hole in the side of the boat well to the stern (Fig. 6). Throughout the whole period of ancient history boats were steered by rudders of this kind. [Illustration: FIG. 6.--THE POSITION OF THE RUDDER IN ANCIENT TIMES.] [Illustration: FIG. 7.--ANCIENT ANCHORS.]