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40 (XL) — 1929-1930
L. T. Carbonisation, 123, 130, 169, 192, 265, 315.
Lamp, Reminder of Duty, 405.
Lancashire Boiler, 301, 415.
Law, Mining, 233.
Lawson, John, Death, 80.
Lead Mine, Towy Valley, 347.
Lease, Dalton Main, 347.
Lectures for Miners, 65.
Lee, Matthew, Retires, 21.
Legislation, 37, 80.
Levelling, 256, 285.
Lewis Prizes, 358.
Life, Urge in, 9.
Lift, Suction, of Pumps, 325.
Lighting Problem, 20.
Lighting, Coal Face, 193, 355.
Line, Division of, 135.
Lining Roadways, 195.
Lining Shafts, 230.
Links, Chains, 288.
Liquid CO2 Blasting, 273.
Longwall, 29, 96.
Longwall, Coal-cutters on, 92.
Low-freezing Explosives, 104.
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