Tie a small stone with the hook of spring balance as shown in Fig. (i). The spring of the balance, stretches due to the weight of the stone. The pointer attached with the spring shows the weight of the stone in the air. Let this weight be iv1. Now, dip the stone in the water as shown in Fig. (ii). We find that the extension of the string decreases and the pointer attached to the spring shows the weight of the stone as w2. This weight (w2) of the stone in water is less than the weight (wi) of the stone in air.
Thus, we conclude that a body (say a stone) loses its weight when immersed in a liquid.