Aimé, a Genevese, who, about 1782, invented the lamp known by his name. It has a hollow wick, so as to admit air to both surfaces of the flame, by which the heat and light are much increased. Until the coal-gas lamp was known, the argand lamp was much used by chemists, and also for illuminating houses. It has also been employed in gas-burners, but consumes much gas.