Degree Spendrup
The Spendrup degree ( unit symbol : ° Spd ), named after the Danish brandy distiller Peter Mathias Spendrup , was a common unit in Denmark for determining the alcohol content .
7.25 ° Spd = 37.5% by volume
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- JSC Schweigger (Ed.): Journal for Chemistry and Physics , Schrag, Nuremberg 1823, pp. 476–478.