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

Förlag	År	Ort	Om boken	ISBN
T. Egerton, Printed by J. Whiting	1819	England, London, London	26 sidor., [3] leaves of plates ill. 23 cm.