People back in the day had just as much terrible advice as we have today, it’s just that the only one that survived long enough to survive to the present day is the really good advice
But to answer the question, anything related to the ingestion of mercury
Classic case of survivorship bias
People back in the day had just as much terrible advice as we have today, it’s just that the only one that survived long enough to survive to the present day is the really good advice
But to answer the question, anything related to the ingestion of mercury
Or anything radioactive. Turns out it was a bad idea to make radium-lined water coolers