A disease common among hat makers in the seventeenth century was caused by their direct contact with?

A disease common among hat makers in the seventeenth century was caused by their direct contact with Mercury, which was used in the process of felting wool to make hats. Prolonged exposure to mercury vapors led to neurological symptoms known as "mad hatter's disease," characterized by tremors, cognitive decline, and mood changes. This occupational hazard highlighted the dangers of toxic substances in industrial processes of the time.