The only US nickels that contained any silver were made from late 1942 through 1945. The silver-alloy coins have a large mint mark above Monticello's dome instead of a small mark to the side. The letter P was used for Philadelphia issues for the first time on any coin.
Dimensions. A curling rink should be 150 feet long and have a maximum width of 16 feet, 5 inches. If a facility is too small to hold rink(s) with these dimensions, a rink can be a minimum of 146 feet long and 14 feet, 6 inches wide. The perimeter of the rink can be marked by raised barriers or by lines drawn on the ice.f a facility is too small to hold rink(s) with these dimensions, a rink can be a minimum of 146 feet long and 14 feet, 6 inches wide.
Curling ice is approximately 3 centimetres thick and is not a smooth surface, but pebbled with bumps of ice. The ideal temperature for curling ice is between â3Â° C and â7Â° C. Ice sheets are maintained with hand-held ice scrapers and re-pebbled by spraying water from a backpack using a special hose head to control the size of droplets.