Citric Acid Punch - cooking recipe

Ingredients

2 oz. citric acid
1 qt. boiling water
5 c. sugar
2 qt. ginger ale
5 qt. cold water
1 (6 oz.) can frozen orange juice
1 (46 oz.) can pineapple juice

Preparation

Dissolve citric acid in boiling water.
This must be prepared in an enamel or heatproof glass container as it will taste bitter if prepared in a metal container.
Dissolve sugar in cold water. Add frozen orange juice and pineapple juice to the citric acid and sugar solution.
You may freeze or serve over attractive ice ring. Serves 75.
When ready to serve, add ginger ale.