1902 introductions

cooling of air in buildings or vehicles

thumb|right|Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer's Eye

thumb|American inventor Leonarde Keeler testing his improved polygraph on [[Arthur Koehler, a former witness for the prosecution at the 1935 trial of Richard Hauptmann]] A polygraph, often incorrectly referred to as a lie detector test, is a pseudoscientific device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiate

thumb|right|150px|Traditional yonkoma layout

international auxiliary language, published by the International Academy of the Universal Language in 1902 under the leadership of W. Rosenberger; a heavy revision of Volapük

flexible cable used to transmit force

300px|thumb|The shopkeeper wears a to protect their clothes.

reaction in which antibodies bind to bacterial capsule

Greek symbol of Hermes erroneously used as a symbol of healing