Report discussing mining practices of a large number of metal mines in the United States and foreign countries and the adaptation of mining methods best suited to the various natural conditions in mines and their comparative costs. This bulletin is concerned primarily with mining or ore production and discusses milling and marketing only in brief.

Report issued by the U.S. Bureau of Mines over practices of metal mining. As stated in the introduction, "this bulletin summarizes mining practices of a large number of metal mines in the United states and foreign countries. The adaptation of mining methods best suited to the various natural conditions in mines is discussed, and comparative costs are presented" (p. 1). This report includes tables, illustrations, and photographs.

Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.

Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1938, activities, service reports, honors, finance, organizational leadership, and other information about scouting programs.