Materials

Materials:
 * 300 mL of 3% solution of dish detergent (300 mL -- In a bowl, mix approximately 9 mL detergent with 290 mL of water.) (Joy® or Dawn® work best)
 * source of natural gas (methane)
 * a funnel (made from the top half of a 2-L soda bottle)
 * 1 #3 1-holed rubber stopper
 * glass tubing (6 mm diam) to fit stopper, 9 cm long
 * rubber hose to fit gas jet nozzle, ca. 1 m long
 * ring stand and large iron ring support (5 in diam)
 * ring stand (buret) clamp
 * candle taped securely to the end of a meter stick ( a lighter works fine too^_^ )