This takes us back to the anchor. The distance from one's
anchor to the center of the eye is about 6 inches; we will usethis value in the following discussion. The length of thearrow is 28 inches. Suppose we have a rifle with a distancebetween the sight of 28 inches and we elevate the rear sightexactly 6 inches we would have quite an angle of elevation.Yet, this is exactly what happens when the archer looks overthe point of his arrow. We have an angle with a base of6 inches and one side of 28 inches. The line of sight and theline of arrow's point direction cross at a distance of 28 incheswhich we will call zero. From zero on to the target or toinfinity, the distance between the line of sight and the lineof arrow's point direction increases in direct ratio to the dis-tance from zero.
