chronoscope

The clock used for exact work is likely to be the Hipp chronoscope, which gives on its dials indications of time intervals in thousandths of a second.

The introduction of resistance by means of the rheostat, R, was frequently a convenient method of correcting the chronoscope.

Besides, I had read articles about the chronoscope, the plethysmograph, the sphygmograph, and others of the new psychological instruments.

Stimulus is given by the operator as soon as the chronoscope is started, and by this act the chronoscope circuit is broken and the record begun.

It is merely two wire electrodes which could be placed upon the animal, with the additional device of a key for the breaking of the chronoscope circuit the instant the stimulus was given.