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“That none from henceforth shall use to multiply gold or silver, nor use the craft of multiplication; and if any the same do
that he incur the pain of felony in this case.”

On this day in 1404 King Henry IV of England outlawed alchemy. The Act Against Multipliers made it a felony to practice transmutation—the act of changing base metals like lead into gold.

In modern terms: 622 years ago a king banned chemistry to keep anyone from getting richer than he was.

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Alchemy was an ancient system built on the belief that all matter consisted of four elements: earth, air, fire, and water. We know now that it’s a lot more complicated than that, but at the time it was believed that if you combined these elements in the correct—and as yet unknown—order, you could make anything. Even gold.

In Henry’s defense, he had reason to be jumpy. He seized the crown from his cousin, Richard II, five years before, after Richard (unsuccessfully) tried to exile him. The years that followed were a blur of uprisings, border challenges, and foreign pressure. From Wales to York and from the Scots to the French, rebellions popped up so often that the map of England began to look like a game of whack-a-mole.

Now, Henry feared that someone might be able to make gold and devalue the treasury. Or worse, bankroll one of his challengers. That, at least, was something he thought he could control.

In the end, it wasn’t gold that felled Henry—it was his health. He was stricken with, well, something, in 1405. Historians are still debating the diagnosis, suggesting everything from stroke to psoriasis to syphilis. The king missed so many sessions of Parliament in 1406—it couldn’t proceed without him, since it was called to finance his military expenditures—that it became referred to as the Long Parliament.

Fun Fact

By the time Henry V—Henry IV’s grandson—was in charge, the crown was granting licenses to favored alchemists.

Alchemy never achieved its mystic promise, but it didn’t disappear with the ban. Instead, it evolved: Isaac Newton believed in it. Robert Boyle—the founder of chemistry—practiced it too. Alchemy boiled down to studying how things interact with other things. What began as mythical transmutation slowly became systematic experimentation.

The act was repealed in 1688. No one ever turned lead into gold. But they did invent modern science.

By the Numbers
  • 13 years: Length of Henry IV’s reign
  • 23 weeks: Timeframe of the Long Parliament
  • 5 to 6 weeks: Timeframe of a standard Parliament
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