Every Boy's Book: A Complete Encyclopædia of Sports and Amusements
“ When the ball, instead of being played against a fixed and inert body, such as a cushion, is played against a moveable sphere, such as itself, the angle formed by the line of direction of the object-ball, and the line of the subsequent course of the cue-ball, will be more obtuse the greater the strength communicated to the cue-ball. ”
