Washington, D.C. United States Bureau of Mines, September, 1930. First edition. Stapled paper. Small quarto, pp 12, illustrated with b/w drawings. Very good; corner crease on last page. Item #19198
According to a forward by Scott Turner, the director of the United States Bureau of Mines, this is the first of a series of papers dealing with mining and treatment methods and costs in the nonmetallic mines, quarries, and pits of the United States, with the ultimate goal to publish a compilation of the papers into a series on topics such as drilling and blasting practice, storage, estimating reserves, and more.