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53 (LIII) — 1942-1943
Accidents in Mines, 3, 38, 64, 87, 110, 128, 173, 200, 209, 232, 280.
Air Calculation, 177, 237, 238.
Air Compressors, 81.
Air Crossings, 241, 297.
Air Distribution, 139, 220.
Air Flow, 234, 243, 281.
Air Horse-power, 117.
Air Necessary, 9.
Air Records, 249.
Air, Expansion of, 67.
Air, Mechanical Mixture, 49.
Air, Weight of, 49.
Air-current, Reversal, 273.
Air-current, Splitting, 282.
Air-currents, Production, 294.
Air-currents, Regulation, 258.
Aneroid Barometer, 116, 125.
Annealing, 250.
Answers to Correspondents, 50, 62, 79, 90, 103, 151, 158, 199, 207, 236, 247, 277, 289.
Arley Seam, Recovery of, 145, 163.
Atmosphere, 49, 93.
Atmospheres, Extinctive, 61.
Atmospheric Conditions, 107.
Atmospheric Pressure, 124, 226.
Awards, Prize Competition, 7.
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