A bow has the following parts: A back, that part away from the archer; a belly, the concave side, when full drawn; a handle or hand grip, a portion near the center for holding the weapon; limbs, that part between the handle and the extremities. These extremities usually have notches, or some contrivance to maintain the string in position, called nocks. The process of bending a bow and attaching the string to the ends is called bracing it. The amount of pull on the string, necessary to draw an arrow a proper distance before discharging it from the bow, may be ascertained in pounds by means of a scale or balance. This is called the "weight" of the bow.