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50 (L) — 1939-1940
Dams, 6, 390.
Deaths from Septicaemia, 3.
Deep Mine Temperatures, 148.
Deep Mines, Air Conditioning, 292.
Deep Mining, 51, 63, 83, 178.
Deputies' Ambulance Grant, 405.
Deputies' Conference, 265.
Derbyshire Toadstones, 99.
Deterioration of Ropes, 106.
Detonators and Explosives, 414.
Dial Surveying, 152, 166, 182, 198.
Dip of Strata, 248.
Diseases, Occupational, 17.
Dispersability of Stone Dusts, 34.
Distances, Measurement, 8.
Doctor's Test, 213.
Dumpy Level, 95, 353.
Dust Extraction Plant, 373.
Dust in Mines, Coal, 180.
Dust Measuring Instruments, 18.
Dust Problems, 305.
Dust Production and Suppression, 107, 213.
Dust Researches, 181, 392.
Dusts in Rand Mines, 87.
Dusts, Mine, Sampling, 185, 224.
Duties of Officials, 61.
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