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[Sphygmographs]

Sphygmograph according to Dudgeon

Sphygmograph nach Dudgeon

  Source   Zimmermann, E. 1923. Liste 33: Über Psychotechnik. Leipzig, Berlin view the source
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  Description   Sphygmograph according to Dudgeon. The sooted paper strip is transported between two rolls. The truss pad spring is adjusted by an eccentric. The apparatus can be fastened by strings, portable in a pocket in an etwee; 0,220
ISSN 1866-4784: reference - xlink