History of Composition
| Years | Weight | Diameter | Thickness | Composition |
|---|---|---|---|---|
| 2000–present | 6.9 g | 27.13 mm | 1.95 mm | 93.15% steel, 4.75% copper, 2.1% nickel plating |
| 1980–1999 | 8.10 g | 27.13 mm | 1.9 mm | 99.9% nickel |
| 1968–1979 | 8.10 g | 27.13 mm | 1.93 mm | 99.9% nickel |
| 1920–1967 | 11.66 g | 29.72 mm | n/a | 80% silver, 20% copper |
| 1908–1919 | 11.62 g | 29.72 mm | n/a | 92.5% silver, 7.5% copper |
Read more about this topic: 50-cent Piece (Canadian Coin)
Famous quotes containing the words history of, history and/or composition:
“The greatest horrors in the history of mankind are not due to the ambition of the Napoleons or the vengeance of the Agamemnons, but to the doctrinaire philosophers. The theories of the sentimentalist Rousseau inspired the integrity of the passionless Robespierre. The cold-blooded calculations of Karl Marx led to the judicial and business-like operations of the Cheka.”
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“Give a scientist a problem and he will probably provide a solution; historians and sociologists, by contrast, can offer only opinions. Ask a dozen chemists the composition of an organic compound such as methane, and within a short time all twelve will have come up with the same solution of CH4. Ask, however, a dozen economists or sociologists to provide policies to reduce unemployment or the level of crime and twelve widely differing opinions are likely to be offered.”
—Derek Gjertsen, British scientist, author. Science and Philosophy: Past and Present, ch. 3, Penguin (1989)