spirit indication

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    Spirit Indication ABV - Inaccurate for sweet wine

    I am trying to determine the alcohol content in some batches of blueberry wine using an Alla France -2 to 10 baume hydrometer and the spirit indication method. It works fine for dry wine, but is wildly inaccurate for sweet wine/port. http://www.musther.net/vinocalc.html#spiritindication...