Throw-in 1842: Several features of this passages are notable: The 1851 rules of Rugby School describe a similar procedure, except that the ball is thrown in rather than struck or hit; this is the ancestor of the line-out in rugby union: Similar "throw-in" laws are found in the Cambridge rules of 1856, the Sheffield rules of 1858, the laws of Melbourne FC (1859), and indeed the original FA laws of 1863 (see below). Other codes had a kick-in rather than a throw-in. These included the "Foot-Ball Club" of Edinburgh (1833), Harrow football (1858), Barnes FC (1862), Blackheath FC (1862), and the
Comparison of Canadian football and rugby union running backs, receivers, and quarterbacks have roles similar to backs in rugby. Because of the playing time, number of pauses, number of players and the nature of the game in general, rugby players will typically need higher physical endurance than Canadian football players while more short-term bursts of physical strength, power, and speed are required in Canadian football (amongst equivalent positions and weights). Collisions between players in rugby union tend to last significantly longer than Canadian football, in which collisions are more often "hits" in which the momentum of the player is enough to bring the other player to ground