The fuel is oil, the wick a piece of string. Many lamps such as these were made by village blacksmiths up to the 19th century. Since the wick tends to drip, a second vesel is sometimes provided underneath to catch surplus oil. The hanging wrought iron cruise oil lamp with single fixed dish (left), has a fitting that has an articulated bar with hook and spike for either suspension or wall-driven fixture.
© Science Museum / Science & Society Picture Library