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53 (LIII) — 1942-1943

S. Derbyshire Coal, 16.

S. Wales Dust Tests, 99.

Safety Badges, Presentation, 200.

Safety Consciousness, 5.

Safety Provisions, 2, 15, 28, 37.

Safety-lamps and Gas Caps, 21, 201.

Safety-lamps, Flame, 189.

Scaling Errors, Effects, 302.

Scholarships, 75.

Seams, Extracting, 108.

Seismic Effects, Quarry Blasting, 27.

Semi-Caving Experiment, 279.

Senior Mining Course Problems, 42, 54, 66, 78, 90.

Shaft Fittings, 47.

Shaft Lining, 105.

Shaft Pillars, 132.

Shaft Pumps, 12.

Shale Mining, 244.

Shot-holes, Position, 245.

Silicosis-Causation Factors, 6.

Sinking, 94.

Sinking, Freezing Method, 11.

Slide Valve, 70.

Sliding Friction, 6.

Sneyd Colliery Explosion, 197.

Soda-acid Extinguisher, 28.

Specific Gravity of Coal, 21.

Sphere, 289.

Splitting of Air, 153.

Spoil Heap Fires, 41.

Spontaneous Combustion, 33.

Sprays at Conveyor Inbye Points, 26.

Sprays, Position, 26.

Steam Engines, 46.

Steel Arches, Lining, 104, 120.

Steel Doors, Use of, 281, 301.

Stemming Material, 155.

Stephenson's Engines, 43.

Stone Dust, 182, 273.

Storage of Coal, 248.

Strip Mining, 17.

Students' Questions and Answers, 27, 40, 53, 89, 98, 121, 161, 169, 224.

Subsidence, 141, 255, 266.

Support and Control, Small Mines, 77.

Surveying, 95.

Surveying Calculations, 114, 126, 136, 150, 162, 174, 184, 198, 210, 223, 233, 246, 259, 268, 277, 289.

Symmetrical Bodies, 30.