Call Number (LC) Title Results
I 28.27:6598 A mechanically driven level rock tunnel / 1
I 28.27:6599 Quarrying methods and costs at the Sloan quarry of the United States Lime Products Corporation, Sloan, Nev. / 1
I 28.27:6600 Milling methods and costs at the lead concentrator of the Hecla Mining Co., Gem, Idaho / 1
I 28.27:6601 Mining methods and costs at the Mt. Hope mine of the Warren Foundry and Pipe Corporation, Mt. Hope, N.J. / 1
I 28.27:6601-6625 Milling methods and costs at the Hillside Fluorspar mines, Rosiclare, Ill. / 1
I 28.27:6602 Shaft-sinking methods, practices, and costs of the Consolidation Coal Co. at its no. 261 mine, Caretta, McDowell County, W. Va. / 1
I 28.27:6603 Method and cost of quarrying limestone at the Milltown quarry of the Louisville Cement Co., Milltown, Indiana / 1
I 28.27:6604 Methods and costs of concentrating scheelite ore at the Silver Dike Mill, Mineral County, Nev. / 1
I 28.27:6605 Milling methods and costs at the Pecos Concentrator of the American Metal Co., Tererro, N. Mex. / 1
I 28.27:6606 Geophysical abstracts : no. 35 / 1
I 28.27:6607 Mining, treatment methods and costs at the plant of the Colsolidated Rock Products Co., Durbin, Calif. / 1
I 28.27:6608 Methods and costs of quarrying, crushing, and grinding limestone at the plant of Southwestern Portland Cement Co., El Paso, Tex. / 1
I 28.27:6609 Quarrying and crushing methods and costs at the Santa Catalina Island quarry of Graham Bros., Inc., Santa Catalina Island, Calif. / 1
I 28.27:6610 Method and cost of quarrying limestone at the plant of the Calaveras Cement Co., San Andreas, Calif. / 1
I 28.27:6611 Small-scale placer-mining methods / 1
I 28.27:6611R Federal placer­mining laws and regulation; Small-scale place-mining methods. 2
I28.27..6611R Federal placer­mining laws and regulation; Small-scale place-mining methods. 2
I 28.27:6612 Gold mining and milling methods and costs at the Vallecito Western Drift mine, Angels Camp, Calif. / 1
I 28.27:6613 Factors governing the selection of the proper level interval in underground mines / 1
I 28.27:6614 A ventilation study of the Graceton Coal & Coke Co. mine, Graceton, Pa. / 1