Call Number (LC) Title Results
I 28.27:6548 List of motors available to prospective builders of permissible outfits / 1
I 28.27:6549 Physical-chemical properties of methane / 1
I 28.27:6550 Milling methods and costs at the Superior concentrator of the Engels Copper Mining Co., Plumas County, Calif. / 1
I 28.27:6551 Milling methods at the Questa concentrator of the Molybdenum Corporation of America, Questa, New Mexico / 1
I 28.27:6551-6571,6573-6575 Crushing and grinding limestone at the Howes Cave (N.Y.) plant of the North American Cement Corporation / 1
I 28.27:6552 Mining laws of Egypt / 1
I 28.27:6553 Crushing and grinding limestone at the Howes Cave (N.Y.) plant of the North American Cement Corporation / 1
I 28.27:6554 Method and cost of quarrying, curshing, and grinding limestone at the Security Quarry of the North American Cement Corporation, Security, Md. / 1
I 28.27:6555 Milling methods at the Concentrator of the Walker Mining Co., Walkermine, Calif. / 1
I 28.27:6556 250 versus 500 volts or more for circuits in gassy coal mines / 1
I 28.27:6557 Hazards to underground workers from inflammable surface structures near mine openings / 1
I 28.27:6558 The importance of discipline in mine safety / 1
I 28.27:6559 Geophysical abstracts : no. 29 / 1
I 28.27:6560 Pumice and pumicite / 1
I 28.27:6561 Quartz gem stones / 1
I 28.27:6562 Abrasive and industrial diamonds / 1
I 28.27:6563 Soapstone / 1
I 28.27:6564 Consumption of primary tin in the United States during 1930 / 1
I 28.27:6565 Mining methods and costs at the Braden Copper Co.'s mines, Sewell, Chile / 1
I 28.27:6566 Chromium : general information / 1