Bullion gold and silver valued at sight to the thousandth part of a penny . Also new and correct tables for reducing of silver and gold Of any Fineness to standard weight, to the thousandth part of a grain, from 100,000 oz. to I grain. They Being the original and only Ones of the Kind hitherto publish'd; And are made plain by Various Examples, Which do also shew that the said Tables are exact, they proving one another. By R. Hayes, Accountant and Writing-Master, in Princes-Street, near the Royal-Exchange.
Hayes, Richard, accomptant and writing-master. | Date: 1734