Jacobus
<templatestyles src="Module:Hatnote/styles.css"></templatestyles>
A Jacobus is an English gold coin of the reign of James I, worth 25 shillings.[1] The name of the coin comes from the Latin inscription surrounding the King's head on the obverse of the coin, IACOBUS D G MAG BRIT FRA ET HI REX ("James, by the grace of God, of Britain, France and Ireland King").
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]
These correspond to masses of 9.10 and 9.82 grams respectively, making the broad Jacobus slightly heavier.
References
- ↑ A Discourse of Coin and Coinage
- ↑ Letter of Isaac Newton dated September 19, 1698, to John Locke, concerning the weight and fineness of various coins.
|
Coins of England
|
||
|---|---|---|
| Silver |
.png) |
|
| Gold |
|
|
| Copper and tin | ||
<templatestyles src="Asbox/styles.css"></templatestyles>
  |
This article related to the history of England is a stub. You can help Wikipedia by expanding it. |
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This coin-related article is a stub. You can help Wikipedia by expanding it. |
