Aimé Argand (1755-1803) was a Swiss physicist and chemist famous for designing a vastly improved version of the oil lamp. Patented in 1784 in England, Argand's design was the first basic change to lamps in thousands of years. Argand's lamp featured the incorporation of a hollow cylinder within the circular wick, allowing air to flow both inside and outside of 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 enhanced brilliance of the flame by preventing side draughts. The Argand lamp gave about 10 times the light of earlier lamps of the same size, as well as a cleaner flame, but its oil consumption was greater.