(for aurum).

2. Electrum, a compound of gold and silver. EL.

3. Silver. AR (argentum).

4. Billon and Potin, alloys of silver and bronze. Bil. and Pot.

5. Bronze. Copper with a percentage of tin. Æ (æs).

§ OF THE TERMS USED TO DEFINE THE VARIOUS PARTS OF A COIN.

The front or face of a coin is called the obverse. Obv.

The back is called the reverse. Rev.

The principal device or object represented on a coin is called the type.

The area or space between the type and the circumference is called the field.