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59 (LIX) — 1948-1949
A. C. Underground Machinery, 41.
Accidents at Mines, 7, 24, 77, 101, 122, 164, 176, 212, 235, 245, 284, 306.
Advisory Council for Scientific Research, 115.
Aerophor Self-contained Breathing Apparatus, 268.
Air Compression, 36, 262.
Air Flow Equalising Devices, 230.
Air Horse-power, 34.
Air in Splits, Reducing, 305.
Air Measurement, 238, 277.
Air Receiver Fittings, 143.
Air Regulator, 22, 227.
Air Tube, Resistance of, 203.
Air, Power to Increase Quantity of, 46, 247.
Air-crossing, 34, 233, 272.
Air-current, Cooling Effect of, 218.
Airway, Resistance of, 239.
Alluvial Deposits, 16.
Alternating Current Motors, 13, 27, 215.
Anemometer, 57, 256.
Annealing Chains, 263.
Answers to Correspondents, 5, 16, 38, 39, 67, 79, 93, 101, 112, 122, 135, 151, 163, 175, 185, 194, 220, 221, 232, 245, 255, 280, 281, 293, 302, 303.
Antipoys Apparatus, 230.
Arcwall Coal-cutters, 157, 166.
Ascensional Ventilation, 277.
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