Pilot light, [27]

Pipes, hot-water, [65]

steam, [69]

Piston, [213]

Plant, acetylene-gas, [221]

gasoline-gas, [220]

Plug, electric, [144]

Pneumatic gasoline lamp, [97]

Press, lard and fruit, [164]

Presser foot, sewing machine, [186], [190]