Page:The Works of the Rev. Jonathan Swift, Volume 10.djvu/302

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294
A LETTER ON MR. McCULLA'S
By which computation, two shillings of his notes, which he sells for one pound weight, will weigh 6288 grains.
But one pound avoirdupois weighs, as above 6960 grains.

This difference makes 10 per cent to Mr. McCulla's profit, in point of weight.

The old Patrick and David halfpenny weighs 149 grains.
Mr. McCulla's halfpenny weighs 131 grains.
——————
The difference is 18

Which is equal to 10½ per cent.

The English halfpenny of king Charles II weighs 167 grains.
McCulla's halfpenny weighs 131 grains.
——————
The difference 36

Which difference allowed, a fifth part is 20 per cent.


ANOTHER COMPUTATION.


Mr. McCulla allows his pound of copper (coinage included) to be worth twentypence; for which he demands two shillings.

His coinage he computes at sixpence per pound weight; therefore, laying out only twentypence, and gaining fourpence, he makes per cent profit 20
The sixpence per pound weight, allowed for coinage, makes per cent 30
The want of weight in his halfpenny, compared as above, is per cent 10
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By all which (viz. coinage, profit, and want of weight) the publick loses per cent 60

If