a Swiss physicist and chemist famous for designing a vastly improved version of the oil lamp. Patented in 1784 in England, this lamp was the first basic change in lamps in thousands of years. Argand's design featured the incorporation of a hollow cylinder within the circular wick, which allowed air to flow both inside and outside the flame at the upper edge of the fuel-soaked wick. The addition of a cylindrical glass chimney created greater draft while promoting steadiness and greater brilliance in the flame by preventing side draughts.