In 1903 a volume was published by the University of Chicago Press,
entitled _Studies in Logical Theory_, as a part of the "Decennial
Publications" of the University. The volume contained contributions by
Drs. Thompson (now Mrs. Woolley), McLennan, Ashley, Gore, Heidel,
Stuart, and Moore, in addition to four essays by the present writer
who was also general editor of the volume. The edition of the
_Studies_ being recently exhausted, the Director of the Press
suggested that my own essays be reprinted, together with other studies
of mine in the same field. The various contributors to the original
volume cordially gave assent, and the present volume is the outcome.
Chaps. ii-v, inclusive, represent (with editorial revisions, mostly
omissions) the essays taken from the old volume. The first and
introductory chapter has been especially written for the volume. The
other essays are in part reprinted and in part rewritten, with
additions, from various contributions to philosophical periodicals. I
should like to point out that the essay on "Some Stages of Logical
Thought" antedates the essays taken from the volume of _Studies_,
having been published in 1900; the other essays have been written
since then. I should also like to point out that the essays in their
psychological phases are written from the standpoint of what is now
termed a behavioristic psychology, though some of them antedate the
use of that term as a descriptive epithet.
J. D.
COLUMBIA UNIVERSITY
April 3, 1916