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Scientific American, Vol. 97, No. 10 (1907) (1907)
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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- ogy’; yet in the past few years advances have been made, and this can be accomplished by the chrono- trically measuring any interval of… … vised and util- train is provid- ed with four ized by psychol- black-enameled ogists for es- © 1907 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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