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58 (LVIII) — 1947-1948
Warwickshire Coalfield, 193.
Washout, 310.
Water Hardness, 237.
Water Horse-power, 251.
Water of Condensation, 178.
Water-ring or Garland, 92.
Weisbach Triangulation, 219.
Weiss Triangulation, 229.
Wheatstone Bridge, 39, 201, 251.
Whitehaven William Colliery Explosion, 116, 307.
Wide Room Mechanised Mining, 174.
Wide Stalls, Driving, 71.
Wigan Mining College's 90th Anniversary, 308.
Winding and Haulage Regulations, 228.
Winding Drum Shafts, 48.
Winding Rope, Circumference of, 263.
Winding Ropes, Extension of Life, 75.
Working Seam Liable to Spontaneous Combustion, 119.
Working Thin Seam, 142.
Working Under Moss, 7.
Worm Gearing, 25, 120.
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