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59 (LIX) — 1948-1949
Derbis, Area occupied by, 137.
Detonators, 201.
Diesel Locomotives, 50, 66, 67, 312.
Diffusion of Gases, 169, 226.
Dobbs-Anderton Dust Extractor, 153.
Drift, Bearing and Length of, 182.
Driving Lines, Maintenance of, 30.
Dust Suppression, 119, 148.
Dust, Collection of, 149, 153, 159.
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