Principles, on which it Appears that a More Perfect System of Currency May be Formed Either in the Precious Or Non-intrinsic Metals: So as to Produce a Representative Coin Or Token, the Genuineness of which May be Instantly Determined by a Separate Gauge, Or an Intrinsic Self-gauging Coin, Any Counterfeit of which Must be Immediatly Detected, However Accurate the Resemblance Or Exact the Weight
Sir William Congreve
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