Mustard (condiment) mixed with horseradish and dried for storage, which were then exported to London and other parts of the country, and are even mentioned in William Shakespeare's play "King Henry the Fourth, Part II". The use of mustard as a hot dog condiment is said to have been first seen in the US at the 1904 St. Louis World's Fair, when the bright-yellow French's mustard was introduced by the R.T. French Company. Mustard is most often used at the table as a condiment on cold meats.It is also used as an ingredient in mayonnaise, vinaigrette, marinades, and barbecue sauce. It is
History of St. Louis (1866–1904) downsides to rapid industrialization was pollution, of which St. Louis generated a great deal. Brick firing produced particulate air pollution and paint making created lead dust, while beer and liquor brewing produced grain swill. However, the worst pollution was coal dust and smoke, for which St. Louis was infamous by the 1890s. Nearly every factory relied on coal to fire steam boilers, the region's homes used a relatively more polluting form of bituminous coal, and railroad traffic created large, dense clouds of coal smoke around depots and railyards. Noise pollution also was a problem, as many residential areas were intermixed