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- Mechanical safeguards in rotary drilling
- The use of boiler feed-water heater with steam-powered rotary drilling equipment
- Progress report on investigation of detachable rock-drill bits
- Hot milling of rock-drill bits at the mines of the Vinegar Hill Zinc Co., Platteville, Wis.
- Progress report no. 2 on investigation of detachable rock-drill bits
- Progress report 4 on investigation of detachable rock-drill bits
- Progress report no. 3 on investigation of detachable rock-drill bits
- Effect of angle of drilling on dust dissemination
- Bit gage v. drilling speed
- Mount Weather testing adit :progress report 1
- Diamond-drill-core storage at Mount Weather Testing Adit
- Development of a rotary test drill
- Drillability studies :diamond drilling
- Drillability determination :a drillability index for percussion drills
- Relationships between annulus thickness and the integrity of resin-grouted roof bolts