rial of plate

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
RIAL OF PLATE, and RIAL OF VELLON, comm. law. Denominations of money of 
Spain. 
     2. In the ad valorem duty upon goods, &c., the former are computed at 
ten cents, and the latter at five cents each. Act of March 2, 1799, s. 61, 1 
Story's Laws U. S. 626. Vide Foreign Coins. 
    

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