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Scientific American, Vol. 97, No. 10 (September 1907) (1907)

leaf 3

An illustration from Scientific American, Vol. 97, No. 10 (September 1907), 1907, leaf 3
rely sides its employment as a timekeeper, is for elec- tion of time as the 1-1,000 part of a second should be on what has been aptly termed "descriptive psychol- trically measuring any interval of time in thousandths made, and this can be accomplished by the chrono- ogy"; yet in the past few years… … struments de- Apparatus for Mapping the Blind Spots of A Sonometer to Detect the Least Perceptible Differ* vised and util- train is provid- the Eye. ence in the Intensity of Sound. ed with four ized by psychol- black-enameled ogists for es- MODERN EXPERIMENTAL PSYCHOLOGY—ITS METHODS AND APPARATUS.…

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