Chapter Ii, "am I a Genius?" Forbes & Co., Chicago.

Education of the Central Nervous System. Reuben P. Halleck. Chapter VII, "Special Sensory Training." American Book Company.

The Moral Life. Arthur E. Davies. Chapter V, "Motive: The Beginnings of Morality." Review Publishing Company, Baltimore.

Psychology. J. R. Angell. Chapter XVI, "The Important Human Instincts." Holt.

Essentials of Psychology. W. B. Pillsbury. Chapter X, "Instinct." Macmillan. Rural parents will find this entire text a non-technical and fundamental help.

Development and Education. M. V. O'Shea. Chapter XII, "The Critical Period." Houghton, Mifflin Company.

Psychology of Child Development. Irving King. Chapter on "Instinct." University of Chicago Press.

Your Boy: His Nature and Nurture. George A. Dickinson, M.D.