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The scientific basis of education demonstrated. By an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind

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Hecker, J. (1867). The scientific basis of education demonstrated. By an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind: in a series of letters, to the Department of public instruction in the city of New York. New York: The author. Retrieved from https://archive.org/details/scientificbasiso00heckrich