llions of similar
neurones each resembling a bit of string frayed out at both ends and
here and there along its course. So also the nerves going out to the
muscles are simply bundles of such neurones, each of which by itself is
a thread-like connection between the cells of the spinal cord or brain
and some muscle. The nervous system is simply the sum total of all these
neurones, which form an almost infinitely complex system of connections
between the sense organs and the muscles."

The word synapses, meaning clasping together, is used as a descriptive
term for the connections that exist between neurone and neurone.

Footnote 2: This is synonymous with James's Involuntary Attention,
Angell's Non-Voluntary Attention, and Titchener's Secondary-Passive
Attention.

Footnote 3: Educational Psychology, Briefer Course, pp. 194-5.

Footnote 4: Thorndike, Psychology of Learning, p. 194.

Footnote 5: How We Think, p. 6.

Footnote 6: The Psychology of Thinking, p. 98.

Footnote 7: How We Think, p. 66.

Footnote 8: How We Think, pp. 69-70.

Footnote 9: Psychology of Thinking, p. 291.

Footnote 10: How We Think, p. 79.

Footnote 11: Thorndike, Educational Psychology, Briefer Course, p. 172.

Footnote 12: Introduction to Psychology, p. 284.

Footnote 13: Thorndike, Origin of Man, p. 146.

Footnote 14: Racial Differences in Mental Traits, pp. 177 and 181.

Footnote 15: Thorndike, Educational Psychology, Briefer Course, p. 374.

Footnote 16: Thorndike, Educational Psychology, Vol. III, p. 304.

Footnote 17: Moral Principles in Education, p. 17.

Footnote 18: For a fuller discussion of this topic see next chapter.

Footnote 19: For a discussion of these scales see Chapter XV.

Footnote 20: The Courtis Tests, Series B, for Measuring the Achievements
of Children in the Fundamentals of Arithmetic, can be secured from Mr.
S.A. Curtis, 82 Eliot Street, Detroit, Mich.

Footnote 21: Measurements of Some Achievements in Arithmetic, by
Clifford Woody, published by the Teachers College Bureau of
Publications, Columbia University, 1916.

Footnote 22: Reasoning Test in Arithmetic, by C.W. Stone, published by
the Bureau of Publications, Teachers College, Columbia University, 1916.

Footnote 23: A Scale for Handwriting of Children, by E.L. Thorndike,
published by the Bureau of Publications, Teachers College, Columbia
University.

Footnote 24: A scale derived by Dr. Leonard P. Ayres of the Russell Sage
Foundation is also v