Cut the rind of two oranges and two lemons very thin, place in a jug, pour in 1 pint of boiling water, add very little ginger (to taste). Squeeze six lemons and six oranges, add the juice of these and a syphon of soda-water. Strain, ice, and serve. Blood oranges, when procurable, are best, and two or three drops of cochineal improves the colour.