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48 (XLVIII) — 1937-1938
H.P. Time Diagram, 184.
Hand v. Machine Mining, 155.
Handling Coal, Invention, 288.
Haulage Accidents, 101, 161, 186, 381.
Haulage Derailments, 170.
Haulage Drawgear Failures, 214.
Haulage Problems, 104, 118, 130, 415.
Head-frame Stresses, 35.
Headgear, Concrete, 112.
Headings, Advance, 29.
Heat and Work, 225.
Heat, Conduction of, 201, 236.
Heat, Convection and Radiation, 210.
Heat, Latent and Sensible, 134.
Heat, Specific, 114.
Helical Gearing, 253.
Henton, L., 136.
Heroism Recognised, 8, 129, 268, 320.
High Lift Pumps, 70.
Holditch Disaster, 5, 21, 48, 85, 342.
Holidays, 176, 231, 283, 293, 320, 329, 341, 363.
Horse-power Winding, 168.
Howe Bridge, Shot-firing, 229.
Hudspeth, Report on Explosions, 138.
Human Factor, 405.
Human Side of Mining, 329.
Humidity of Air, 166.
Hydraulic Burster, 42, 233.
Hydrogen and Oxvgen, 354.
Hydrogenation, Coal, 179, 197, 323, 372.
Hydrogenation, Cracking of Tars, 103.
Hygrometers, 178.
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