Arsura
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Lat. [from ardere, to burn.] In old English law. Burning, or melting; the trial or assay of money by fire after it was coined, in order to test its purity. A term frequently used in Domesday Book. Spelman. Reddit tot librae ad arsuram; pays so many pounds according to the test by fire; that is, so many pounds of lawful, approved or tried money.
Cowell.
The loss of weight occasioned by this process. A pound was said to burn so many pence (tot ardere denarios) as it lost by the fire.
Spelman.