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58 (LVIII) — 1947-1948
L. and C. Miners' Relief Society, 276.
Lanark (Central) Coalfield, 232.
Lancashire Boiler, 119.
Lancashire Coalfield, 185.
Latent Heat, 35.
Leicestershire Coalfield, 206.
Length of Drift, 214, 227, 239.
Levelling, Error in, 21.
Levelling, Surveying and, 6, 16, 26, 43, 50, 66, 73, 85, 98, 128, 133, 148, 162, 170, 188, 196, 206, 219, 241, 260, 266, 283, 291, 306.
Lever Safety Valve, 130.
Lift and Force Pumps, 15.
Liquids, Specific Gravity of, 57, 93.
Loading in Narrow Rooms, 157.
Locomotive Traction, 276.
Logan Slab Coal-cutter, 301.
Longwall Advancing, 227.
Longwall Face, Supporting, 10.
Longwall Faces, Stripping on, 265, 282, 292, 301.
Longwall Retreating, 11, 216.
Longwall Working, Mechanised, 184, 195.
Longwall Working, Opening Beyond Fault, 251.
Longwall Working, Setting Out, 12.
Loss of Head, 47.
Louisa Old Pit Explosion, 136, 248.
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