CENTRE OF GRAVITY 



Terrestrial Attraction the combined Action of parallel Forces.— Single equivalent Force.— Exam- 

 ples.— Method of finding the Centre of Gravity. — Line of Direction.— Globe. — Oblate Spheroid. — 

 Prolate Spheroid. — Cube. — Straight Wand.— Flat Plate.— Triangular Plate. — Centre of Gravity 

 not always within the Body. — A Ring. — Experiments. — Stable, instable, and neutral Equilibrium. — 

 Motion and Position of the Arms and Feet. — Effect of the Knee-joint. — Positions of a Dancer. — 

 Porter under a Load. — Motion of a Clnadruped. — Rope Dancing. — Centre of Gravity of two Bod- 

 ies separated from each other. — Mathematical and experimental Examples. — The Conservation of 

 the Motion of the Centre of Gravity. — Solar System. — Centre of Gravity sometimes called Centre 

 of Inertia. 



