History of Composition
| Years | Mass | Diameter/Shape | Composition |
|---|---|---|---|
| 2000–present | 4.40 g | 23.88 mm | 94.0% steel (unspecified alloy), 3.8% copper, 2.2% nickel plating |
| 1968–1999 | 5.05 g | 23.88 mm | 99.9% nickel |
| 1967-1968 | 5.83 g | 23.88 mm | 50% silver, 50% copper |
| 1953–1967 | 5.83 g | 23.88 mm | 80% silver, 20% copper |
| 1920–1952 | 5.83 g | 23.62 mm | 80% silver, 20% copper |
| 1910–1919 | 5.83 g | 23.62 mm | 92.5% silver, 7.5% copper |
| 1908–1910 | 5.81 g | 23.62 mm | 92.5% silver, 7.5% copper |
Read more about this topic: Quarter (Canadian Coin)
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“Systematic philosophical and practical anti-intellectualism such as we are witnessing appears to be something truly novel in the history of human culture.”
—Johan Huizinga (1872–1945)
“In the history of the United States, there is no continuity at all. You can cut through it anywhere and nothing on this side of the cut has anything to do with anything on the other side.”
—Henry Brooks Adams (1838–1918)
“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)