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- Use of the churn drill at lime-plant quarries
- 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
- Relation of dust dissemination to water flow through rock drills
- Diamond-drilling blast holes, eastern Magnetite Mine A
- Diamond drilling blast holes, Balmat Mine, St. Lawrence County, N.Y.
- Shaft sinking by diamond drilling, Bellefonte mine, National Gypsum Co., Centre County, Pa.
- Diamond-drilling blast holes, Bellefonte Mine, National Gypsum Co., Centre County, Pa.
- Diamond-drilling blast holes, Eastern Magnetite Mine C
- Diamond-bit performance in sandstone
- Noise from pneumatic rock drills :analogy studies of muffler designs
- Investigations of stresses in a drill bit and rock under static loads
- Accuracy in estimating metal content and tonnage of an ore body from diamond-drill-hole data
- Drillability studies :statistical regression analysis of diamond drilling
- Drillability studies :impregnated diamond bits
- Drillability studies-laboratory percussive drilling
- Energetics of percussive drills
- Effect of organic additives on impregnated diamond drilling
- Noise abatement of pneumatic rock drill
- Noise reduction of a pneumatic rock drill
- Design of a compact muffler for a jumbo drill
- Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills
- Zeta potential control for simultaneous enhancement of penetration rates and bit life in rock drilling
- Abrasive-enhanced water-jet drill for hard rocks
- Zero-surface-charge-controlled drilling for enhanced penetration and extended bit life