Lemonade with Citric & Tartaric Acid

If you have a food processor, peel the yellow skin from the lemons with a potato peeler and chop them with a cup of the sugar using the metal chopping blade. Otherwise, grate them. Bring the water, sugar grated rind to the boil, then remove from the heat and add the juice and the carefully measured acids and Epsom salts. (Use level measuring spoons.) Stir until dissolved, then strain into clean bottles. Store in refrigerator. For long storage, bottle immediately, cover tightly, then dip tops in wax when cool. This cordial is good with iced water, soda water, iced tea, gin, whisky and rum. If you are making it only for adult use, add an extra teaspoon of each of the acids.