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41 (XLI) — 1930-1931
Dam, Construction of, 62, 289.
Dance, Pit, Recalled, 245.
Dangers, Mining Electrical, 346, 394.
Death, 38 Years After, 4.
Deepest Mine, 43.
Depreciation, 5.
Deputies' Association, 25.
Deputies' Safety Talks, 198, 208, 212, 226, 250, 262, 278, 294, 306, 324, 338, 358, 374, 390.
Detonators, 45, 236, 334.
Development, Coalfield, 335.
Diamond Boring, 382.
Differential Ram Pump, 76.
Diffusion, Gases, Law, 99, 189, 354.
Dip of Seam, 94.
Direct-acting Haulage, 50.
Direct-current Motors, 258, 274, 298.
Diseases, Coalfield, 353, 399.
Distress Fund, 311.
Double-acting Ram Pump, 59.
Douglas, James, 305.
Drill Hole, Deepest, 389.
Drilling Precautions, 143.
Drilling, Cost of, 170.
Driving through Loose Ground, 374.
Drum, Rope Speed on, 62.
Duplex Ram Pump, 59.
Durham Miners' Secretary, 103.
Duties, Fireman's, 190.
Duties, Mines Commissioners', 101.
Dynamos, 175.
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