| − | A '''firkin''' is a capacity measurement equal to one quarter of a [[barrel]].<ref>U.S. Department of Transportation Maritime Administration [http://www.marad.dot.gov/publications/glossary/F.html]</ref> | + | A '''firkin''' is a [[capacity]] measurement equal to one quarter of a [[barrel]].<ref>U.S. Department of Transportation Maritime Administration [http://www.marad.dot.gov/publications/glossary/F.html]</ref> |