Lay in the bottom of a tumbler some pieces of the yellow rind of an orange or lemon, pared off very thin; and add a heaping table-spoonful of powdered loaf-sugar. Upon this, place some pounded ice. Pour on sherry wine till the tumbler is one-third, or half full. Hold an empty tumbler inverted or turned downwards, upon the top of that which contains the ingredients; placing the glasses so that their edges exactly meet, and leaving no opening for any portion of the contents to escape. Keep your hands fast on the two tumblers, one above and one below, and turn them up and down, back and forwards, till the articles inside are thoroughly mixed. Then take off the upper tumbler, and let the lower one stand still a few moments before you fill it up with ice-water.