Chemical element of metals. Cu comes from Cuprum, Fe comes from Ferrum, Ag from Argentum. The symbols were not followed by a period (full stop) as with abbreviations. Later chemical elements were also assigned unique chemical symbols, based on the name of the element, but not necessarily in English. For example, sodium has the chemical symbol 'Na' after the Latin "natrium". The same applies to "W" (wolfram) for tungsten, "Fe" (ferrum) for iron, "Hg" (hydrargyrum) for mercury, "Sn" (stannum) for tin, "K" (kalium) for potassium, "Au" (aurum) for gold, "Ag" (argentum) for silver, "Pb" (plumbum) for lead, "Cu" (cuprum) for copper, and
¡Cu-Cut! ¡Cu-Cut! ¡Cu-cut! was a Catalan illustrated satirical magazine, written in Catalan. Published in Barcelona between 1902 and 1912, it followed the political line marked by Francesc Cambó's Lliga Regionalista. ¡Cu-cut!, named after the cuckoo bird (), was first published on 2 January 1902 and, like El Be Negre magazine that would be published later, it steadfastly opposed Lerrouxism in Spain. Its director was Manuel Folch i Torres and most articles were written by Josep Morató i Grau, Eduard Coca i Vallmajor and Manuel Urgellès, among others such as Josep Abril i Virgili and Vicenç Caldés i Arús. The main illustrators