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48 (XLVIII) — 1937-1938
L.T.C. Tests, 92.
Lamp Bulbs, 120, 352.
Lancashire Boiler, 127.
Lancashire, S., Upper Coal, 277.
Lauder and Pit Ponies, 69.
Leasehold Calculation, 365.
Legislation, Early Mining, 150.
Legislation, Milestones in, 55.
Lenses, 294.
Lessons of Explosions, 113.
Levelling, Surface, 413.
Levers, 94.
Life, Engineering's Effect, 41.
Light and Shadow, 247.
Light, Reflection, 262.
Light, Refraction, 276.
Lighting, Mine, 7, 37, 59, 103, 120.
Link Chains, 209.
Liquids, Expansion of, 52.
Little Main Seam, 346.
Littlewood, A., 39.
Loading Points, Dust, 149.
Lubrication, Motor Bearings, 224.
Lubrication, Rope, 197, 316.
Lubrication, Winding Engine, 287.
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