The Real or Intrinsic par of exchange, between London and the other cities on which negotiations in bills are usually made; calculated from the actual assays made at the Mint, by the accurate Sir Isaac Newton, of the several foreign coins; whereof a table follows (Printed for R. Willock, at Sir Isaac Newton's Head in Cornhill, 1731)
English Short Title Catalog, T231253
Goldsmiths', 6896
Hanson, 4258
Reproduction of original from University of London's Goldsmiths' Library