Lime Cooler

1 cup Sugar
1 cup Water
2 Lemons
1 cup Lime Juice
Green food coloring
2 cups Carbonated Water
1 pint Sherbet

Cut lemons in slices. Combine sugar, water, and lemon slices. Bring to a boil, and cook for 5 minutes. Add lime juice and chill. Just before serving, add a few drops of food coloring and carbonated water. Pour into chilled tall glasses. Add a scoop of sherbet to each glass and serve at once.