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Weight/Mass | Convert from firkin [butter, soap] to flask |
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Common Weight Conversions Metric Weight Conversions Unit Definition (firkin [butter, soap]) The firkin [butter, soap] is a traditional unit of weight for butter and soap, equal to 4 stone or 56 pounds (about 25.40 kilograms). Unit Definition (flask) The flask is a commercial unit of weight formerly used to measure liquid mercury (or quicksilver, as it was called). The flask was equal to 76.5 pounds avoirdupois, which is equivalent to almost exactly 34.7 kilograms.
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