Browsing: Early Diary of John Adams, Volume 1

<The phaenomina of> The nature of the Pulley, axis in peritrochaeo, and inclined Plane explained, which all depend on the laws before laid down (viz) that the quantity of matter in the weight bears the same proportion to the quantity of matter in the power, as the distance of the power from the Center of motion, to the distance of the weight from said Center.