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50 (L) — 1939-1940

Packing, 186.

Pennington, Henry, 154.

Pensions, Aged Miners', 203.

Permissible Explosives, Blasting, 84.

Picking Belts, Lighting, 247.

Pillar and Stall Calculations, 285.

Pillar, Driving Room through, 127.

Pillars, Coal, 239.

Pillars, Strength of Small, 374.

Pit Heaps, 55, 58, 108, 181.

Pit Sinking Arrangements, 191.

Pithead Baths, 3, 11, 21, 36, 55, 58, 83, 104, 124, 149, 167, 181, 215, 280, 299, 328, 357.

Plans, Areas on, 16.

Plant and Equipment, 283, 345.

Plotting Surveys, 216, 232, 327.

Pneumatic Picks, 258.

Poidih Colliery Recovery, 282.

Pointers, Commissioners', 1, 17.

Polyphase Currents, 201.

Power Factor Correction, 354.

Power Station Coal, 35, 87.

Preparation of Coal, 251.

Principle of Safety-lamp, 349.

Prize Competition, 12, 28, 44, 61, 76, 92, 109, 125, 140, 155, 172, 188, 204, 219, 236, 252, 269, 284, 300, 316, 333, 348, 364, 381, 397.

Prize Competition Awards, 405.

Problems, 6, 24, 40, 56, 72, 73, 86, 120, 144, 184, 200, 214, 246, 280, 296, 310, 326, 345, 354, 376, 390.

Problems, War-time, 276.

Processes Producing Dust, 180.

Producer Gas, 267.

Prop Withdrawal, 125.

Props, Lids and Bars, 219.

Protective Equipment, 7, 10, 33, 51, 75, 202, 339, 380, 412.

Pump Slip, 285.

Pumps, Colliery, 204.

Pumps, Multi-stage, 345.

Punctuality and Safety, 72.