For experimentally verifying the laws of triangle, parallelogram and polygon of forces. Comprising of a circular 40 cm. Diameter aluminium disc, graduated into 360 degrees. Complete with leveling screws, clamping device to fix the table at any desired angel, five sliding clamp pulleys, central ring, string and five sets of iron. Nickelled slotted weights, each set containing nine weights and one hanger of 50 gms. Each.