THE LEVEE AID WHEELWORK. 



Simple Machine. — Statics. — Dynamics. — Force. — Power. — Weight. — Lever. — Cord. — Inclined 

 Plane. — Arms. — Fulcrum. — Three kinds of Lever. — Crow-Bar . — Handspike. — Oar. — Nut- 

 Crackers. — Turning Lathe. — Steelyard. — Rectangular Lever. — Hammer. — Load between two 

 Bearers. — Combination of Levers. — Equivalent Lever. — Wheel and Axle. — Thickness of the 

 Rope. — Ways of applying the Power. — Projecting Pins. — Windlass. — Winch. — Axle. — Horiaon- 

 tal Wheel.— Tread-mill.— Cranes.— Water- Wheels.— Paddle-Wheel.— Rachet- Wheel.— Rack.— 

 Spring of a Watch. — Fusee. — Straps or Cords. — Examples of. — Turning Lathe. — Revolving 

 Shafts. — Spinning Machinery. — Saw-Mill. — Pinion. — Leaves. — Crane. — Spur- Wheels. — Crown- 

 wheels. — Bevelled Wheels. — Hunting-Cog.— Chronometers.— Hair-Spring.— Balance- Wheel. 



VOL. II.— 16 



