An instrument for simultaneous multichannel duplication of a polygraphic recording.

Abstract
An instrument for simultaneous multichannel recording was developed for use with a common polygraph (Physiograph) used in teaching and research. The device permits distribution of data from a single channel to 1-4 duplicating channels so that multiple records of an event are obtainable on a single record. Use of the instrument provides each student with a simultaneously duplicated record of the physiological parameter being monitored. Applications of the instrument in the physiology teaching laboratory are discussed. Construction and operation details are included.

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