I found this recipe in an old book called "Enquire Within Upon Everything" first published by Houlston and Sons 1886.

Ingredients

• 250 grama icing sugar
• 125 grams each tartaric acid and bi-carbonate soda
• 40 drops lemon essence (about 1 teaspoon)

Method

1. (The original Recipe Method)
2. All powders should be well dried, add teh essence to the sugar, then the other powders, stir all together and mix by passing twice through a hair sieve. Must be kept in tightly-corded bottles into which a damjp spoon must not be inserted. The sugar must be froung or very finely pulversized in a pestle and mortar. The powdered sugar sold for icing cakes will do.

Cooks Tips

I have converted the measurements to make it easier for the modern day cook.