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- catalog contributor b9559374.
- catalog created "1901.".
- catalog date "1901".
- catalog date "1901.".
- catalog dateCopyrighted "1901.".
- catalog description "Thesis (Ph. D.)--University of Chicago.".
- catalog extent "1 p. ℓ., [283]-306 p. incl. illus., diagrs.".
- catalog issued "1901".
- catalog issued "1901.".
- catalog language "eng".
- catalog publisher "Chicago [University of Chicago]".
- catalog subject "Attention.".
- catalog subject "Psychometrics.".
- catalog title "On the measurement of mental activity through muscular activity and the determination of a constant of attention ...".
- catalog type "text".