<P> A flat - wick lamp is a simple type of kerosene lamp , which burns kerosene drawn up through a wick by capillary action . If this type of lamp is broken , it can easily start a fire . A flat - wick lamp has a fuel tank ( fount ) , with the lamp burner attached . Attached to the fuel tank , four prongs hold the glass chimney , which acts to prevent the flame from being blown out and enhances a thermally induced draft . The glass chimney needs a `` throat '' , or slight constriction , to create the proper draft for complete combustion of the fuel ; the draft carries more air ( oxygen ) past the flame , helping to produce a smokeless light , which is brighter than an open flame would produce . </P>
why does kerosene oil rise up in the wick of lantern
capillary action