Steaming or artificial humidity was the process of injecting steam from boilers into cotton weaving sheds in Lancashire, England, in the late 19th and early 20th centuries. The intention was to prevent breakages in short-staple Indian Surat cotton which was introduced in 1862 during a blockade of American cotton at the time of the American Civil War. There was considerable concern about the health implications of steaming. Believed to cause ill health, this practice became the subject of much campaigning and investigation from the 1880s to the 1920s. A number of Acts of Parliament imposed modifications.