Horizontal Kymograph

Psychology

Accession Number: 2011.psy.68

Instrument Name: Horizontal Kymograph

Description:

A brass drum sits horizontally between anterior axle post and posterior mechanical drive box. The instrument is mounted on a large ovoid metal base with an adjustable front foot with screw for leveling the instrument. The instrument is mechanically driven. A governor maintains the brass drum at a constant speed.

Alternative Name:

Primary Materials: Brass, Metal

Markings:

Manufaturer’s label engraved on the top “Pirard et Coeurdevache, Constructerus, 7 rue Blainville, Paris.

Dimensions (cm):

Height = 20, Width = 15.5, Length = 46.5

Function:

The Kymograph records temporal variations in physiological or muscular events. The revolving drum would be wrapped with smoked paper which was marked by a signal marker. See, Titchener, E. B. (1918). Experimental Psychology, a Manual of Laboratory Practice: Volume I, Quantitative Experiments, Part II. Instructor’s Manual. New York: MacMillan, Vol. 1, pp. 172-176.

Condition: Excellent

Associated Instruments:

Manufacturer:

Pirard et Coeurdevache, Constructerus, 7 rue Blainville, Paris

Date of Manufacture:

Late 19th Century or Early 20th Century

Provenance:

Department of Psychology, University of Toronto

Donated to UTSIC: No

Historical Notes:

Psychologists first used kymographs for recording blood pressure. Experimental psychologists adopted the kymograph as an instrument for recording various time-related events: response times, stimulus presentations, muscle exertion and tuning fork vibrations. The preparation of smoked paper, an art in itself, consisted of placing a blank sheet of paper over a stand and exposing it to petroleum lantern fumes.The experimenter then wrapped the smoked paper around the drum. The signal maker would contact the drum as it rotated, leaving a line record. Following the recording, the experimenter varnished the paper for permanent keeping (Titchener, 1918). Two of August Kirschmann’s students at the University of Toronto refer directly to one of the earliest horizontal kymographs used in the laboratory, in a study on the estimation of time intervals. (Shaw and Wrinch, 1900).

Titchener, E. B. (1918). Experimental Psychology, a Manual of Laboratory Practice: Volume I, Quantitative Experiments, Part II. Instructor’s Manual. New York: MacMillan, Vol. 1, pp. 172-176.

Shaw and Wrinch, 1900 [need full citation]