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57 (LVII) — 1946-1947
Haigh Pit, Report on, 237.
Hand Haulage, 147, 162.
Haulage Calculations, 219, 227.
Haulage Engine, 299.
Haulage Motor and Control Gear, 120.
Haulage Return Wheel, 226.
Haulage, Self-acting, 169.
Headgear Pulley, Revolutions by one Wind, 118.
Headgear Sheaves, Plan of, 3.
Headings and Drifts, Ventilation of, 222.
Heat and Moisture, 258.
Heat of Compression, 134.
Heat of Conduction, 134.
Heat, Sensible and Latent, 178.
Heating Power of Coal, 155.
Height of Rail on Curve, 36.
Hoppit, 274.
Horse Haulage, 162.
Horses, Care and Treatment, 259.
Hurwood Electric Coal Drill, 113.
Hydraulic Coalburster, 23, 58, 263.
Hygrometer, 126.
Hygrometer Readings, Significance of, 127.
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