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 ("Jacob
, 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 41st: 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.
Dollar is the name of more than 25 currencies. The United States dollar, named after the international currency known as the Spanish dollar, was established in 1792 and is the first so named that still survives. Others include the Australian dollar, Brunei dollar, Canadian dollar, Eastern Caribbean dollar, Hong Kong dollar, Jamaican dollar, Liberian dollar, Namibian dollar, New Taiwan dollar, New Zealand dollar, Singapore dollar, Trinidad and Tobago Dollar and several others. The symbol for most of those currencies is the dollar sign $ in the same way as many countries using peso currencies. The name "dollar" originates from Bohemia and a 29 g silver-coin called the Joachimsthaler.
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol is lbm, #, and ℔ or ″̶.
The standard circulating coinage of the United Kingdom, British Crown Dependencies and British Overseas Territories is denominated in pennies and pounds sterling, and ranges in value from one penny sterling to two pounds. Since decimalisation, on 15 February 1971, the pound has been divided into 100 (new) pence. Before decimalisation, twelve pence made a shilling, and twenty shillings made a pound.
The shilling is a historical coin, and the name of a unit of modern currencies formerly used in the United Kingdom, Australia, New Zealand, other British Commonwealth countries and Ireland, where they were generally equivalent to 12 pence or one-twentieth of a pound before being phased out during the 1960s and 1970s.
Troy weight is a system of units of mass that originated in 15th-century Kingdom of England and is primarily used in the precious metals industry. The troy weight units are the grain, the pennyweight, the troy ounce, and the troy pound. The troy grain is equal to the grain unit of the avoirdupois system, but the troy ounce is heavier than the avoirdupois ounce, and the troy pound is lighter than the avoirdupois pound. One troy ounce equals exactly 31.1034768 grams.
The English penny, originally a coin of 1.3 to 1.5 grams pure silver, was introduced c. 785 by King Offa of Mercia. These coins were similar in size and weight to the continental deniers of the period and to the Anglo-Saxon sceats which had preceded it.
The British florin, or two-shilling piece, was a coin worth 1⁄10 of one pound, or 24 pence. It was issued from 1849 until 1967, with a final issue for collectors dated 1970. It was the last coin circulating immediately prior to decimalisation to be demonetised, in 1993, having for a quarter of a century circulated alongside the ten-pence piece, identical in specifications and value.
The five pound British gold coin, also known as a quintuple sovereign, has a nominal value of five pounds sterling. It has been struck intermittently since 1820, though as a circulation coin only in 1887, 1893 and 1902. Through most of its history, it has depicted, on its reverse, Benedetto Pistrucci's portrayal of St George and the Dragon, which has traditionally been used on the sovereign, or one-pound gold coin.
The guinea was a coin, minted in Great Britain between 1663 and 1814, that contained approximately one-quarter of an ounce of gold. The name came from the Guinea region in West Africa, from where much of the gold used to make the coins was sourced. It was the first English machine-struck gold coin, originally representing a value of 20 shillings in sterling specie, equal to one pound, but rises in the price of gold relative to silver caused the value of the guinea to increase, at times to as high as thirty shillings. From 1717 to 1816, its value was officially fixed at twenty-one shillings.
The Quarter guinea was a British coin minted only in the years 1718 and 1762. As the name implies, it was valued at one-fourth of a guinea, which at that time was worth twenty-one shillings (£1.05). The quarter guinea therefore was valued at five shillings and threepence in sterling specie.
The British crown was a denomination of sterling coinage worth 1⁄4 of one pound, or 5 shillings, or 60 (old) pence. The crown was first issued during the reign of Edward VI, as part of the coinage of the Kingdom of England.
The sovereign is a British gold coin with a nominal value of one pound sterling (£1) and contains 0.2354 troy oz of pure gold. Struck since 1817, it was originally a circulating coin that was accepted in Britain and elsewhere in the world; it is now a bullion coin and is sometimes mounted in jewellery. In addition, circulation strikes and proof examples are often collected for their numismatic value. In most recent years, it has borne the design of Saint George and the Dragon on the reverse; the initials of the designer, Benedetto Pistrucci, are visible to the right of the date.
Sterling is the currency of the United Kingdom and nine of its associated territories. The pound is the main unit of sterling, and the word pound is also used to refer to the British currency generally, often qualified in international contexts as the British pound or the pound sterling.
During his residence in London, Isaac Newton had made the acquaintance of John Locke. Locke had taken a very great interest in the new theories of the Principia. He was one of a number of Newton's friends who began to be uneasy and dissatisfied at seeing the most eminent scientific man of his age left to depend upon the meagre remuneration of a college fellowship and a professorship.
Letters on the English are a series of essays written by Voltaire based on his experiences living in Great Britain between 1726 and 1729. The book was published first in English in 1733 and then in French the following year, where it was seen as an attack on the French system of government and was rapidly suppressed.
From c. 1124 until 1709 the coinage of Scotland was unique, and minted locally. A wide variety of coins, such as the plack, bodle, bawbee, dollar and ryal were produced over that time. For trading purposes coins of Northumbria and various other places had been used before that time; and since 1709 those of the Kingdom of Great Britain, and then of the UK.
The British shilling, abbreviated "1s" or "1/-", was a unit of currency and a denomination of sterling coinage worth 1⁄20 of one pound, or twelve pence. It was first minted in the reign of Henry VII as the testoon, and became known as the shilling, from the Old English scilling, sometime in the mid-16th century. It circulated until 1990. The word bob was sometimes used for a monetary value of several shillings, e.g. "ten-bob note". Following decimalisation on 15 February 1971 the coin had a value of five new pence, and a new coin of the same value but labelled as "five new pence" or "five pence" was minted with the same size as the shilling until 1990, after which the shilling no longer remained legal tender. It was made from silver from its introduction in or around 1503 until 1946, and thereafter in cupronickel.
The sovereign was a gold coin of the Kingdom of England first issued in 1489 under King Henry VII. The coin had a nominal value of one pound sterling, or twenty shillings. The sovereign was primarily an official piece of bullion and had no mark of value on its face. Nonetheless, it was the country's first coin to be valued at one pound.
The Bank of England £1 note was a sterling banknote. After the ten shilling note was withdrawn in 1970, it became the smallest denomination note issued by the Bank of England. The one pound note was issued by the Bank of England for the first time in 1797 and continued to be printed until 1984. The note was withdrawn in 1988 due to inflation and was replaced by a coin.
The Exchequer Standards may refer to the set of official English standards for weights and measures created by Queen Elizabeth I, and in effect from 1588 to 1825, when the Imperial units system took effect, or to the whole range of English unit standards maintained by the Court of the Exchequer from the 1200s, or to the physical reference standards physically kept at the Exchequer and used as the legal reference until the such responsibility was transferred in the 1860s, after the Imperial system had been established.