Memorandum on Spanish, Portuguese, Dutch and Imperial denominations and on the new French louis d'or of May 1709 Isaac Newton c. 420 words The Newton Project Oxford 2017 Newton Project, University of Oxford

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 29 April 1714, c. 420 words.

Signed and dated by Newton.

 MINT 19/2/6, National Archives, Kew, Richmond, Surrey, UK UKSurreyKew, RichmondNational Archives MINT 19/2/6 29 April 1714 England English Unknown Hand MintAnalyses of Foreign Coin and Exchange Rates Catalogue information compiled by Rob Iliffe, Peter Spargo & John Young Catalogue exported to teiHeader by Michael Hawkins Transcribed by Will Scott
6210

Observations upon the valuation of Gold and Silver in proportion to one another.

A Spanish Pistole coyned for 32 Reaus or four piece of eight & is the sixteenth part of the weight thereof & of like allay.

A Doppia Moeda or Moyder of Portugal was coyned for 4000 Res or ten Crusados, & is the sixteenth part of the weight thereof & of like allay.

Gold is therefore by the standards of Spain & Portugal, of sixteen times more value then silver of like allay & equal weight. And at this rate a Guinea is worth so much fine silver as is conteined in 22s 1d of English money of just weight and allay. Now this high value carries away the silver from Spain as fast as it comes from the west Indies, & the scarcity of silver in that kingdom (& I think also in Portugal) puts them upon making their payments at home in Gold & refusing to pay in silver without a premium of six per cent. At wchwhich rate a Guinea is worth 20s. 9d.

In France by the Edict of May 1709 a new Lewid'or was coyned for 20 Livres or four new Lewises of silver & is of like the fifteenth part of the weight thereof & of equal allay. And by the same Edict fine Godld is valued at fifteen times its weight of fine silver. At which rate a guinea is worth 20s 8d12 in silver

In Holland the Ducat isof Holland & that of the Empire is current at 5 Guilders & 5 stivers, that is, at so much fine silver as is conteined in 9s 114d English. At wchwhich rate a Guinea is worth 20s 712d. At Hannover the Ducat is valued at two old Rix Dollers or four Guilders, that is, at 9s 1d English. And Gold bears much the same proportion to silver in Italy as in Germany. In England therefore that Gold & Silver may have the same proportion to one another as in the neighbouring parts of Europe, a Guinea should be valued at twenty shillings & 7d & 8d or at the most, one pound weight of fine gold should be valued at fifteen pounds weight of fine silver, in England whereas one pound weight of fine silver Gold should beis at present valued at fifteen pounds weight of six ounces seventeen penny weight & five grains of fine silver, which is almost four per cent too high. Mint Office Apr 29. 1714