How is a Hydrometer used to measure the alcoholic content of something?!

All you need:

http://en!.wikipedia!.org/wiki/Hydrometer

http://leebrewery!.com/hydromet!.htm

http://www!.grapestompers!.com/articles/hy!.!.!.

http://www!.youtube!.com/watch!?v=nVi4r2lAx!.!.!.Www@FoodAQ@Com

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In low density liquids such as kerosene, gasoline, and alcohol, the hydrometer will sink deeper, and in high density liquids such as brine, milk, and acids it will not sink so far!. In fact, it is usual to have two separate instruments, one for heavy liquids, on which the mark 1!.000 for water is near the top of the stem, and one for light liquids, on which the mark 1!.000 is near the bottom!. In many industries a set of hydrometers is used — covering specific gravity ranges of 1!.0–0!.95, 0!.95–0!.9 etc — to provide more precise measurements

An alcoholometer is a hydrometer which is used for determining the alcoholic strength of liquids!. It is also known as a proof & traille hydrometer!.

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