Alloy are relatively similar in size, the atom exchange method usually happens, where some of the atoms composing the metallic crystals are substituted with atoms of the other constituent. This is called a "substitutional alloy". Examples of substitutional alloys include bronze and brass, in which some of the copper atoms are substituted with either tin or zinc atoms respectively. In the case of the interstitial mechanism, one atom is usually much smaller than the other and can not successfully substitute for the other type of atom in the crystals of the base metal. Instead, the smaller atoms become trapped in the
Fish and Tin and Copper and Dancers, was set to the song Fish and Tin and Copper. The group had originally performed it as a demonstration dance at the opening ceremony of Lowender Peran in 1997. The chorus of the song inspired the use of traditional steps and patterns to represent these Cornish industries, including steps from the Newlyn Fisherman's Reel, followed by a chain (swimming fish), then the turning of wheels and cogs of the mines. Fish and Tin and Copper Fish and Tin and Copper is a traditional folk song/ballad associated with Cornwall, and dealing with the legend of the devil ("Old Nick")