Domestic medicine or domestic health care is the behavioral, nutritional and health care practices, hygiene included, performed in the household and transmitted from one generation to the other. Such knowledge is complementary to the specialized skills of doctors and nurses. Consisting of preventive and curative tools, often related to first aid and medical herbs uses, the concept of domestic medicine, was first made popular in Western countries by Scottish physician William Buchan in the 18th century, and was spread by domestic economy manuals through the following two hundred years. An example of such a manual was written by English homeopath John Henry Clarke in the 19th century, A Dictionary of Domestic Medicine and Homeopathic Treatment.