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Encyclopedia Britannica - Main :: PAI-PAS |
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PARALLELISM, PSYCHOPHYSICAL , in pyschology, the theory that the conscious and nervous
nervous
body
or crosshead, as it is often n a'M called, is to be guided. AB C is the middle line of half the beam, C being the fixed centre about which the beam oscillates. A link BD connects a point in the beam with a radius
oscillates about a fixed centre at E. A point P in BD, taken so that BP.: DP :: EN : CM, move in a path which coincides very closely with the straight line MPN. Any other point F in the line CP or CP produced is made to copy this motion by means of the links AF and FG, parallel to BD and AC. In the ordinary application of the parallel motion a point such as F is the point of attachment
pump
Watt
long believed that the production of an exact straight-line motion by pure linkage was impossible, until the problem was solved by the invention of the Peaucellier cell. (See also MECHANICS
Mechanics
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