One of the mysteries of the English language finally explained.
- archaic term for sulphuric acid
- ‘Mix one fourth pound of indigo with half an ounce of oil of vitriol & a little water; shake the bottle every day till the whole is dissolved.’
- ‘In the late 18th and early 19th centuries, extra acid in the form of vinegar or tartaric acid (or in one recipe oil of vitriol), were added to boiled sugar, and modern drops evolved.’
- ‘For them special labels had to be printed with the old name: ‘distilled oil of vitriol’.’
- ‘The alchemists called sulfuric acid oil of vitriol, a reference to its corrosive nature.’
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