The recipe
Ingredients
Directions
Rub the gum camphor in the alcohol until it is fine.
Work in the magnesia.
Add the water, stir, and filter.
Recipe from a historical cookbook (Internet Archive).
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
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