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50 (L) — 1939-1940
Gas and Dust Experiments, 391.
Gas Detectors, 394.
Gases, Dangerous, 30, 238.
Gases, Mine, 92, 173.
Gassy, Mines Potentially, 20.
Gates, Safety, 271.
Gear Wheels, 13.
Geological Survey of G.B., 277, 309.
Geology, 69, 79, 310.
Geothermic Gradient, 6, 215, 237.
Gob-fires, Detection, 7.
Goodwill and Co-operation, 1.
Grading of Notts, and Derby Coals, 104.
Gresford Colliery, Question, 37.
Ground, Stocking Coal on, 276.
Guides, Cage, 317.
Gypsum, Transporter, 161.
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