Abrasion

The lo sustained by coins or by gold or silver bars by rubbing against each other or against other objects or substances. The value of gold or silver for export or import is reckoned by weight and finene whether-in coins or bars.: The law says that any gold coins of the United States reduced in weight by natural abrasion not more than 1-2 of I per cent after a circulation of twenty years, as shown by 7 the date of coinage, and at a ratable proportion for any period le than twenty years, shall be received at their nominal value by the United States Treasury. 10