Metrication in the United Kingdom that reported in 1818, and again in Parliament by Sir John Wrottesley in 1824. Another Royal Commission was set up 1838 by Chancellor of the Exchequer Thomas Spring Rice and it reported in 1841 that decimal coinage was required first. A third commission in 1853 advocated decimal coinage in the form £1 : 10 florins : 100 cents: 1000 mils. The first florins (one tenth of a pound sterling) were struck in 1849 as silver coins weighing and having a diameter of . An early supporter of the "Decimal Association" was the mathematician Augustus de Morgan whose articles supporting the
Pound sterling English traders stipulated to be paid in pounds of the "Easterlings", which was contracted to "'sterling". For further discussion of the etymology of "sterling", see sterling silver. The currency sign for the pound is £, which is usually written with a single cross-bar (as on sterling bank notes), though a version with a double cross-bar (₤) is also sometimes seen. This symbol derives from medieval Latin documents; the Roman words "libra", "solidus", and "denarius" (£sd) referred to pounds, shillings and pence in the British pre-decimal (duodecimal) currency system and the black-letter "L" was the abbreviation for "libra", the basic Roman