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41 (XLI) — 1930-1931
Machine Mining, 18, 20, 128, 152.
Magnetic Declination, 79.
Magnetising Needle, 191.
Main-and-Tail Rope, 66, 80.
Maintenance of Equipment, 194.
Managers at Birmingham, 376.
Materials, Use and Storage, 142.
Mathematics and Mining, 105, 123, 135, 150, 181, 197, 212.
May Examinations, 73, 84.
Mechanical and Electrical Staffs, 70.
Mechanical Efficiency, 415.
Mechanics, Elementary, 50, 398.
Medallists, South Wales, 48.
Men and Mines, 257.
Metalliferous Mining, 133.
Mine Gases, 116, 120, 129, 319.
Mineral Boycott and War, 139.
Miner's Dial, 270.
Miner's Gallantry, 389.
Mining in 1929, Coal, 68.
Mining Institute of Scotland, 123, 327.
Mixed Series and Parallel Grouping, 74.
Moisture Testing Instrument, 157.
Motive Column, 126.
Motor Calculations, 314.
Motor Efficiencies, 322.
Motor Spirit from Coal, 407.
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