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40 (XL) — 1929-1930

Pamphlet, No. 6, Safety, 300, 307.

Paper 16, Physical Survey, 314.

Paper 24, Fuel Research, 265.

Paper 25, Reactivity of Coke, 393.

Paper 52, Fuse Boxes, 59.

Paper 53, Ignition of Firedamp, 59, 72.

Paper 54, Frictional Sparking, 68.

Paper 55, Support of Workings, Lancs., 56.

Paper 56, Coal Dust Inflammability, 202.

Paper 57, Gas Masks, 241.

Paper 58, Steel Pit Props, 330, 360.

Paper 59, Constitution of Steel, 396.

Park on Pit Heap, 213.

Peak Loads, 153.

Penclawdd Explosion, 171.

Pensions, Miners, 153.

Perimeters and Areas, 227.

Phthisis on the Rand, 321.

Pillars, Shaft, 207.

Pinder, Geo., G. Wedding, 233.

Pipe Joints, 189.

Pipe Lines, Power, 153.

Pipes, Flow of Water, 261.

Pit Heaps, 33, 213.

Pit Lad's Holiday, 99.

Pit Ponies, 8, 389.

Pithead Baths, 43, 59, 97, 167, 183, 185, 209, 245, 251, 263, 273, 280, 336, 347, 363.

Pithead Plant, 351.

Plan, Plotting Workings, 46.

Plans, 157.

Plunger Pumps, Shaft, 362.

Pneumatic, Tools, 388.

Polygon, Area of, 107.

Pony Bolted, 136.

Pottery Coalfield, 95.

Power Factor, 5.

Power Units of, 244.

Power, Coal-cutters, 93.

Power, Colliery, 216.

Pressure and Thrust, Centre, 203, 220.

Pressure in Fuse Boxes, 59.

Pressure of the Atmosphere, 23.

Pressure Problem, 383.

Pressure, Current and Resistance, 115.

Pressure, Strata, and Mining, 221.

Primary Cell, 170.

Principle of Siphon, 210.

Prism, Volume, 164.

Prismoid, Volume, 182.

Prize Competition, 13, 28, 44, 60, 76, 92, 108, 124, 141, 156, 173, 188, 204, 220, 236, 253, 268, 284, 300, 317, 333, 349, 365, 381, 397.

Prize Competition Awards, 409.

Properties of Gases, 258.

Properties, Coal, 146.

Proto Apparatus, 86.

Pulley Speeds, 243.

Pulverised Fuel, 21, 54, 102, 129, 200, 245, 273.

Pumping Plant, 325, 348, 372, 382, 386, 404.

Pumps and Pumping, 16, 30, 63, 157, 205, 242, 266, 271, 276, 325, 348, 349, 351, 367, 383, 386, 404.

Pyramid Problem, 395.

Pythagoras, Theorem, 83.