Records of the Forest Research Divisions, 1892-1954 112. In 1909 the Forest Service undertook to obtain through voluntary observers information on the time of leafing, flowering, and fruiting of forest trees. These records, arranged alphabetically by name of correspondent, include letters and reports relative to the observations of these volunteers. Records of the Division of Watershed Management Research, 1925-51 135. Relate to such subjects as research programs on climatic problems, soil stabilization, erosion control, and flood control.
Some correspondence is included.
Arranged by subject and thereunder by experiment station. General Cartographic Records 18. Names of railroads and canals are listed and keyed by number to the proper location on each map. Records of National Forests Divisions Division of Timber Management 94. Manuscript, photoprocessed, and published maps, graphs, charts, and related data.