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
Pot-au-feu serving. Traditionally, the broth is served first with a bit of nutmeg and the marrow (if a marrowbone was used) spread on toasted bread. Then the meat and the vegetables are served with coarse salt and strong Dijon mustard, horseradish sauce, and sometimes also with gherkins pickled in vinegar. "Pot-au-feu" broth may also be used as a soup (often enriched with rice, pasta or toasted bread), as a base for sauces, or for cooking vegetables or pasta. Ready-to-use concentrated cubes are available to make what purports to be "pot-au-feu" broth when water is added. Many countries have similar dishes with