Download or read book Milling Methods at the Concentrator of the Walker Mining Co., Walkermine, Calif written by M. R. McKenzie and published by . This book was released on 1932 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describing the milling methods at the Walkermine concentrator, Plumas County, Calif., is one of a series being prepared by the United States Bureau of Mines on milling methods and costs in the various mining districts throughout the United States