Each administrative district embraces a number of National Forests and is in charge of a Forest officer known as the District Forester who is responsible to the Forester for all administrative and technical work performed within the district. Each District Forester is aided by several assistants and by specialists in various lines of work. Each National Forest is in charge of a Forest Supervisor who may have a Deputy and a Forest Assistant or Forest Examiner to assist him if the amount of business on a National Forest warrants it. Each National Forest is subdivided into Ranger districts for the purpose of facilitating the protection work. Each Ranger district is in charge of a Ranger who may be assisted by other Rangers or Forest Guards. _The Washington Office._ The work of the Forest Service in Washington is organized under the Office of Forester and the Branches of Operation, Lands, Silviculture, Research, Grazing, Engineering, and Acquisition of lands under the Weeks Law. The Office of Forester includes the Associate Forester, the Editor, the Dendrologist, the Chief of Accounts, besides Inspectors and Lumbermen. The Branch of Operation administers and supervises the business organization of the Forest Service and has general supervision of the personnel, quarters, equipment, and supplies of the Service and all the fire protection and permanent improvement work on the National Forests. The Branch of Lands examines and classifies lands in the Forests to determine their value for forest purposes, conducts the work in connection with claims on the Forests prior to proceedings before United States registers and receivers, and assists the Chief Engineer of the Service in handling matters in connection with the occupation and use of the National Forest lands for hydro-electric power purposes. The Branch of Silviculture supervises the sale and cutting of timber on the National Forests and coöperates with States in protecting forest lands under Section 2 of the Weeks Law. The Branch of Research has supervision over the investigative work of the Service, including silvicultural studies, studies of state forest conditions, investigations of the lumber and wood-using industries and lumber prices, and the investigative work carried on at the Forest Products Laboratory and the Forest Experiment Stations. The Branch of Grazing supervises the grazing of live stock upon the National Forests, allotting grazing privileges and dividing the ranges between different owners and classes of stock. It is also charged with the work of improving depleted grazing lands and of coöperating with the Federal and state authorities in the enforcement of stock quarantine regulations. The Branch of Engineering has to do with the proper designing and planning of roads, trails, and bridges; with the engineering problems involved in granting permits to hydro-electric plants in the Forests; and with the making of forest maps, surveys, improving the forest atlas,