Calculations of the weight and value of the new louis d'or and louis d'argent which are to be made current in Ireland

Author: Isaac Newton

Source: MINT 19/2/223, National Archives, Kew, Richmond, Surrey, UK

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- Revision History
  - 1 January 2001
    - Catalogue information compiled by Rob Iliffe, Peter Spargo & John Young
  - 29 September 2011
    - Catalogue exported to teiHeader by Michael Hawkins
  - 29 October 2016
    - Transcribed by Will Scott
  - 13 January 2017
    - Checked by Will Scott
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<223r>

To the most honourable the Earl of Oxford & Earl Mortimer Lord High Treasurer of Great Britain.

May it please your Lordship

According to your Lordships Order of Reference signified to us by Lowndes his Letter dated 29^th of April last we have considered the annexed Letter of the Lords of the Privy Council in Ireland concerning the making current the new French moneys of Gold & Silver in that kingdom, together with the annexed Report of M^r Vincent Kidder Assaymaster there concerning the intrinsic values of those moneys. And by the weight of 55000 Louidiors of the new species amounting to 1197^Lwt 1^oz 11^dwt we find that singly they are in weight one with another 5^{dw^t} 4^gr 9 $\frac{1}{2}$ ^mi And by the Assays of several Ingots melted out of new Louidors compared with the Assays of many single pieces We find that they are at a medium one grain & one 12^th part of a grain worse then standard. And therefore by the weight & assay together they are singly worth but twenty shillings & six pence in England. And in Ireland where a Guinea passes for 1^li 3^s they are worth 1^li 1^s 11^d $\frac{1}{2}$ , & in our humble opinion should not pass there for more then 1^li 2^s. At which rate the half Lewidor may pas for 11^s & the Quarter for 5^s 6^d.

Fifteen hundred silver Louisses of the new species weighed 1470 ounces, & therefore one with another they weigh singly an ounce wanting 9^gr 12^mites. They are an halfpenny weight worse then standard one with another, & therefore their standard weight at a medium is an ounce wanting 10 $\frac{1}{3}$ grains. And so they are wroth 5^s & three farthings a piece in England at present. And in Ireland where a Crown piece English passes for 5^s 5^d these Lewises singly are worth 5^s 5^d $\frac{3}{4}$ $\frac{1}{16}$ , & in the nearest rownd number may pass for 5^s 6^d & the half Lewises for 2^s 9^d & the Quarter pieces for 16 $\frac{1}{2}$ ^d.

All which is most humbly submitted to your Lordships great wisdome