Note 91 — Chapter V · EVOLUTION OF THE PRINCIPAL CONCEPTS.

Maclellan & Dewey (Psychology of Number and Its Application to Methods of Teaching Arithmetic, New York, 1895) made pedagogical deductions from this fact. They ask, for beginners, that the examples should be borrowed from continuous quantity, and that number be considered as a particular species of measure.—In his book Our Notions of Number and Space (Boston, 1894) Nichols, taking a theory of James about judgments of number as the basis of his experiments, tries to show that the simultaneous sensation of two points applied to the skin originates in the successive sensation of a distinct contact upon two separate tactile circles.