_The Bureau of Plant Industry_ studies plant life in its relations to agriculture. It investigates the diseases of plants and carries on field tests in the prevention of diseases. It studies the improvement of crops by breeding and selection, maintains demonstration farms, and carries on investigations with a view to introducing better methods of farm practice. It conducts agricultural explorations in foreign countries for the purpose of securing new plants and seeds for introduction into the United States. It studies fruits, their adaptability to various climates, and the methods of harvesting, handling, storing, and marketing them. _The Forest Service_ is charged with the administration of the National Forests. It also gives practical advice in the conservation and handling of national, state, and private forest lands, and in methods of utilizing forest products; investigates methods of forest planting, and gives practical advice to tree planters; studies commercially valuable trees to determine their best management and use; gathers statistics on forest products, in coöperation with the bureau of the census, and investigates the control and prevention of forest fires, and other forest problems. _The Bureau of Chemistry_ conducts investigations into the chemical composition of fertilizers, agricultural products, and food stuffs. In pursuance of the pure food law of 1906, it examines foods and drugs intended to be sent from one state to another, with a view to determining whether they are adulterated or misbranded. It also conducts investigations of food stuffs imported from abroad and denies entry to such as are found unwholesome, adulterated, or falsely labeled. It also inspects food products intended to be exported to foreign countries where standards of purity are required. _Other Bureaus_, whose duties are indicated by their titles, are: the bureau of soils, the bureau of crop estimates, the bureau of entomology, the bureau of biological survey, the bureau of markets, and the bureau of public roads. =The Department of Commerce= embraces what remains of the department of commerce and labor created in 1903, and divided in 1913 by the creation of the department of labor. It is charged with the promotion of the commerce of the United States and its mining, manufacturing, shipping, fishing, and transportation interests.