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60 (LX) — 1949-1950
Packs, Building, 274.
Permitted Explosives, 5.
Pipe Joints, 85.
Pipes, Thickness of, 202.
Plane Figures, Area of, 133.
Pneumatic Stowing, 72.
Polar Planimeter, 5.
Polygons, 133.
Potential Energy, 128.
Power Problem in Coal Industry, 126, 138.
Power Transmission, 150, 162.
Precise Levelling Across River, 64.
Prize Competition, 9, 21, 33, 45, 57, 70, 81, 93, 105, 116, 129, 141, 152, 165, 177, 189, 201, 213, 224, 236, 249, 261, 273, 285, 298, 309.
Prize Competition Awards, 301.
Proto Apparatus, 24.
Pulley Shaft, Force on, 11.
Pumps, 65, 72, 117, 119, 147, 241.
Pythagoras, Theorem of, 112.
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