Direction

in military mechanics, signifies the line or path of a body in motion, along which it endeavors to force its way, according to the propelling power that is given to it. Angle of Direction , that formed by the lines of direction of two conspiring powers. Quantity of Direction , a term used by military mathematicians for the product of the velocity of the common centre of gravity of a system of bodies, by the sum of their quantities of matter: this is no ways altered by any collisions among the bodies themselves.