2d—The Balance and Stilyard, with all their Properties and Uses shewn and explain'd.

The Method of estimating the Momentum, or Quantity of Motion in any given Body.

The general Principle of Mechanicks established upon this Method.

Experiments to demonstrate the different Effects of the same Weight of Power acting in different Directions at the same Point of any Engine.

The Resolution of Forces into those of other Directions.

All the various Kinds of Levers explain'd.

3d—All the Phænomena of Pulleys, both single and in all their possible Combinations explain'd.

The Power of the Wheel or Axis in Peritrochio explain'd.

The Wedge, with the Method of comparing its Force, deduced from Experiments.

The Screw, with the manner of computing its Force.