 We have a demonstration of the decrease in the melting point of ice with increasing pressure. We have a block of ice. We have two very heavy weights that are connected by a very thin wire. We're going to hang the weights on the ice block. The heavy weights cause a high amount of pressure to be exerted under the wire. The increase in pressure decreases the melting point of the ice and the wire slips through the liquid water. When the pressure is released, the melting point of the ice goes back up and the ice solidifies. Eventually the wire works its way completely through the block of ice and the block stays intact.