has been soaked in a solution of nitre and then thoroughly dried. This string, when once lighted, burns very slowly and a piece one inch long is sufficient for the purpose. Some performers prefer a small piece of punk, as it requires no preparation. Still others use tinder made by burning linen rags, as our forefathers used to do. This will not flame, but merely smoulders until the breath blows it into a glow. The tinder is made by charring linen rags, that is, burning them to a crisp, but stopping the combustion before they are reduced to ashes.
Flames from the lips may be produced by holding in the mouth a sponge saturated with the purest gasoline. When the breath is exhaled sharply it can be lighted from a torch or a candle. Closing the lips firmly will extinguish the flame. A wad of oakum will give better results than the sponge.
Natural gas is produced as simply. A T-shaped gas pipe has three or four gas tips on the cross-piece. The long end is placed in the mouth, which already holds concealed a sponge, or preferably a ball of oakum, saturated with pure gasoline. Blowing through
