This apparatus is used for the study of Lame's Law?and the principles of?vector. This set of apparatus?comprises of?a circular?piece of wood?410 mm. in diameter 12 mm.?thick, with?a?0-360?degree?scale. At the center of the wood, there is a slot for the insertion of 3 legs of 41cm. in length each placed at 60 degrees apart. The apparatus also include a metal ring, L-shaped tube, a rope, and a hook with pendulum weights.