wards, and so changes its situation at every change of posture.
Chap. LXIV.—Of balancing the Weight round the Centre of Gravity in Bodies.
A figure standing upon its feet without motion, will form an equipoise of all its members round the centre of its support.
If this figure without motion, and resting upon its feet, happens to move one of its arms forwards, it must necessarily throw as much of its weight on the opposite side, as is equal to that of the extended arm and the accidental weight. And the same I say of every part, which is brought out beyond its usual balance.
Chap. LXV.—Of Figures that have to lift up, or carry any Weight.
A weight can never be lifted up or carried by any man, if he do not throw more than an equal weight of his own on the opposite side.
Chap. LXVI.—The Equilibrium of a Man standing upon his Feet, Plate VI.
The weight of a man resting upon one leg will always be equally divided on each side of the central or perpendicular line of gravity, which supports him.
Chap. LXVII.—Of Walking, Plate VII.
A man walking will always have the centre of gravity over the centre of the leg which rests upon the ground.
