Thrush, a disease characterised by the development of white patches on the mucous membrane of the mouth, throat, and tongue. [APHTHAE.] Thrush is most commonly met with in early infancy, and, under such conditions, is usually attributable to faullty diet, and readily responds to simple remedies. A dose of castor-oil, the addition of lime-water to the milk, and the local application of mel boracis, combined with scrupulous cleanliness and care in the administration of proper food, usually prove efficaclous in curing thrush in young infants. When thrush appears in adults, it is often a symptom of grave significance.