I 28.27:6594
|
Sampling and exploration by means of hammer drills |
1 |
I 28.27:6597
|
Public services for the identification of mineral specimens |
1 |
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 28.27:6602
|
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, Ind |
1 |
I 28.27:6604
|
Methods and costs of concentrating scheelite ore at the Silver Dike Mill, Mineral County, Nevada |
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. 1-127 |
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 28.27:6611
|
Small-scale placer-mining methods |
1 |
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 28.27:6616
|
Mica-mining methods, costs, and recoveries at no. 10 and no. 21 mines of the Spruce Pine Mica Co., Spruce Pine, N.C. |
1 |
I 28.27:6619
|
Milling methods and costs at the concentrator of the Britannia Mining & Smelting Co., Ltd., Britannia Beach, B.C. |
1 |
I 28.27:6620
|
Geophysical abstracts, no. 1-127 |
1 |
I 28.27:6621
|
Milling methods and costs at the Hillside Fluorspar mines, Rosiclare, Ill |
1 |