Mineral resource conservation is accomplished through the industrial operations by which minerals are extracted, processed, recycled, and reused. Taken together, such operations and the people they employ constitute our mineral technology. To assure that such technology will be compatible with all the other vital needs of our society, the Bureau of Mines conducts a broad and varied reserach and factfinding effort. Developing and promoting new and improved technology, seeking safer methods, and devising more efficient techniques and cleaner processes are major Bureau objectives and have been since the Bureau was established in 1910. Over the years, the Bureau has become known as the federal government's principal mineral technology and information agency. This pamphlet describes new trends in the Bureau of Mines technologic and analytic programs that touch on the full range of mining and mineral processing operations, and that are planned and conducted so as to serve clear national needs.