2 oz. tartaric acid (cream of tartar)
2 tbsp. flour
2 lb. white sugar
Whites of 2 eggs
2 qt. water
Juice of 1 lemon

Mix cream of tartar and flour with sugar. Combine all ingredients. Boil about 3 minutes. When wanted to use put 1/2 teaspoon baking soda in a glass. Dissolve in 1/2 glass water. Pour into it about 2 tablespoons of the lemon mixture and it will foam to the top of the glass.

This is sometimes called "The Deacons Summer Drink" and flavored with winter green instead of lemon.