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41 (XLI) — 1930-1931
A.C. and D.C., Differences, 238.
A.C. Synchronous Motors, 372.
A.M.E.E. Medal, 137.
Absenteeism, 360.
Accidents in Mines, 3, 38, 40, 43, 64, 68, 91, 99, 103, 122, 128, 129, 135, 137, 172, 173, 181, 184, 185, 224, 235, 240, 252, 277, 281, 305, 315, 323, 339, 344, 345, 375, 376, 377, 408.
Advertise Coal, 137.
Aerial Exploration, 331.
Afterdamp, 117.
Aged Miners' Homes, 38, 329, 361, 376, 407.
Air, 17, 42, 318.
Air and Gas Mixtures, 170.
Air Circulation, 135, 155.
Air Plows, Control, 305.
Air Vessels on Pumps, 178.
Air-crossings, 30, 285.
Air-current, Measurement, 51, 110.
Air-doors, 77.
Air-leakage, 210.
Allinson, J. J. C, Death, 309.
Alsdorf Holocaust, 117.
Ambulance Competitions, 8, 124, 185, 225, 263, 301, 325, 347, 359, 376, 411.
Analysis, Coal, 207.
Answers to Problems, 17, 42, 49, 74, 83, 102, 114, 131, 169, 170, 187, 199, 209, 227, 229, 279, 290, 308, 310, 326, 342, 372, 378.
Appointments, 55, 265.
Aquatole Pumps, 36.
Arches, Pilling Between, 54.
Arithmetic, 61, 126, 318.
Asphyxia, 21.
Auchengeich Explosion, Echo, 389.
Auchinraith Explosion, 389, 410.
Auxiliary Ventilation, 27.
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