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50 (L) — 1939-1940
Rand Mines, Dusts, 87.
Rand Silicosis Measures, 177.
Ranging and Measuring Lines, 22, 38.
Readers' Problems, 6, 24, 40, 56, 72, 86, 120, 184, 200, 214, 246, 280, 296, 310, 326, 345, 354, 376.
Recreation Schemes, 58.
Reef, Tracing, 56.
Regulators, 349.
Reinforced Concrete, 261, 284.
Relief Society, 256, 343, 360.
Report (1938), Secretary for Mines, 257.
Report on Firedamp Explosion, 296.
Report, Electrical Inspector's, 124, 150.
Report, Explosives, 100.
Report, Health Research, 179.
Report, S.M.R.B., 106.
Report, Safety in Mines, 34.
Rescue Apparatus, 319.
Research, Coal, 4, 299.
Respiratory Equipment Classified, 195.
Road Dusts, Testing, 151.
Road Repairs, 253.
Roadhead Accidents, 62, 147.
Roadway Support Conditions, 157, 243.
Roadways, Design, 43.
Roadways, Falls on, 115, 225.
Rock Structure, 79.
Rock-dusting Methods, 188, 384.
Rocks of Economic Importance, 112.
Roof Control, 129, 136.
Roof Movement, 39, 396.
Roof on Machine Faces, 169.
Roof Supports, 151, 228.
Rope Calculation, 40.
Rope Capel, 45.
Rope Examination, 72.
Rope Girders, 334.
Rope, Wire, 106.
Rowbottom Wheel, Inventor, 116.
Royal Show Centenary, 16.
Rubber, 132.
Runaways, 274.
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