The magical shows two copper coins one in right hand and one of silver in the left hand. Closes both hands and when opens them the coins change of place, the one of silver is in the right hand and the one of copper in the left half. Says that he is going to repeat it. Places both coins in the left hand, and retires with the right hand the copper coin, closes both hands and when opens them the coins have changed again of place. Now everything can be given to examine.