But there is built upon it a set of wooden upper works, in the shape of a long trough, extending from end to end; and the top-heaviness of this addition to the hull would instantly overturn the vessel, unless some device were applied to preserve its upright position.

This purpose is accomplished by means of an out-rigger on one side, consisting of two curved poles, or slender but tough spars, laid across the canoe at right-angles to its length, and extending to the distance of twelve, fifteen, or even twenty feet, where they join a small log of buoyant wood, about half as long as the canoe, and lying parallel to it, with both its ends turned up like the toe of a slipper, to prevent its dipping into the waves.

The inner ends of these transverse poles are securely bound by thongs to the raised gunwales of the canoe.

The out-rigger, which is always kept to windward, acting by its weight at the end of so long a lever, prevents the vessel from turning over by the pressure of the sail; or, should the wind shift suddenly, so as to bring the sail aback, the buoyancy of the floating log would prevent the canoe from upsetting on that side by retaining the out-rigger horizontal.

The mast, which is very taunt, or lofty, supports a lug-sail of immense size, and is stepped exactly in midships, that is, at the same distance from both ends of the canoe.