<P> A quick estimate of the alcoholic strength, or proof, of the distillate (the ratio of alcohol to water) is often achieved by shaking a clear container of the distillate . Large bubbles with a short duration indicate a higher alcohol content, while smaller bubbles that disappear more slowly indicate lower alcohol content . </P> <P> A common folk test for the quality of moonshine was to pour a small quantity of it into a spoon and set it on fire . The theory was that a safe distillate burns with a blue flame, but a tainted distillate burns with a yellow flame . Practitioners of this simple test also held that if a radiator coil had been used as a condenser, then there would be lead in the distillate, which would give a reddish flame . This led to the mnemonic, "Lead burns red and makes you dead ." or "Red means dead ." Although the flame test will show the presence of lead and fusel oils, it will not reveal the presence of methanol (also poisonous), which burns with an invisible flame . </P> <P> A more reliable method of determinating the alcoholic strength is to use scientific testing equipment, such as an alcoholmeter or hydrometer . A hydrometer is used during and after the fermentation process to determine the potential alcohol percent of the moonshine, whereas an alcoholmeter is used after the product has been distilled to determine the volume percent or proof . </P> <P> Varieties of moonshine are produced throughout the world . </P>

What is the highest percentage of alcohol in moonshine