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[[Isaac Newton]] refers to the coin in a letter to [[John Locke]]:
[[Isaac Newton]] refers to the coin in a letter to [[John Locke]]:
<blockquote>'' The Jacobus piece coin'd for 20 shillings is the 41th: part of a pound Troy, and a Carolus 20s piece is of the same weight. But a broad Jacobus (as I find by weighing some of them) is the 38th part of a pound Troy.''</blockquote><ref>[http://www.gold.org/value/reserve_asset/history/monetary_history/vol1/1698sep19.html Letter of Isaac Newton, dated
<blockquote>'' The Jacobus piece coin'd for 20 shillings is the 41th: part of a pound Troy, and a Carolus 20s piece is of the same weight. But a broad Jacobus (as I find by weighing some of them) is the 38th part of a pound Troy.''</blockquote><ref>[http://www.gold.org/value/reserve_asset/history/monetary_history/vol1/1698sep19.html Letter of Isaac Newton] dated
September 19, 1698, to John Locke, concerning the weight and fineness of various coins].</ref>
September 19, 1698, to [[John Locke]], concerning the weight and fineness of various coins.</ref>


==References==
==References==
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[[Category:Coins of England]]
[[Category:Coins of England]]
[[Category:Gold coins]]




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{{England-hist-stub}}
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Revision as of 23:33, 16 April 2011

A Jacobus is an English gold coin of the reign of James I, worth 25 shillings.[1]

Isaac Newton refers to the coin in a letter to John Locke:

The Jacobus piece coin'd for 20 shillings is the 41th: part of a pound Troy, and a Carolus 20s piece is of the same weight. But a broad Jacobus (as I find by weighing some of them) is the 38th part of a pound Troy.

[2]

References

  1. ^ A Discourse of Coin and Coinage
  2. ^ Letter of Isaac Newton dated September 19, 1698, to John Locke, concerning the weight and fineness of various coins.