Mental development

The Story of the Mind

James Mark Baldwin

The Mind and Its Education

George Herbert Betts

Gentle Measures in the Management and Training of the Young
Or, the Principles on Which a Firm Parental Authority May Be Established and Maintained, Without Violence or Anger, and the Right Development of the Moral and Mental Capacities Be Promoted by Methods in Harmony with the Structure and the Characteristics of the Juvenile Mind

Jacob Abbott

A Lecture on Physical Development, and its Relations to Mental and Spiritual Development, delivered before the American Institute of Instruction, at their Twenty-Ninth Annual Meeting, in Norwich, Conn., August 20, 1858

S. R. Calthrop

Inquiries into Human Faculty and Its Development

Francis Galton