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    Re: DR thread from Nov-Dec '04
    From: Marvin Sebourn
    Date: 2005 Jan 18, 20:34 EST
    A petroleum barrel is, and has been for at least 50 years (probably much longer) 42 gallons. This has been in oil field production, natural gas transmission, etc. 1 gallon = 231 inches^3.
    Oil and anti-freeze are commonly sold in  barrels (or drums) of 55 gallons, but these are referred to as "55 gallon (drums or barrels)".
     
    Marvin Sebourn
       
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