Clark, W.H.Humphries, Corin2018-06-262018-06-268/30/1932http://hdl.handle.net/11274/9917The purpose of this study is stated in the introductory chapter. The final choice of subject matter, the method and manner of treatment are the result of an ever increasing wonder at the slow but steady evolution of the mind of the race, recorded in the page of literature and shown in the progress of scientific knowledge; and an expression of the wish that the scientific study of mind may lead to conservation of human potentialities and the resultant healthy attainment of happiness.en-USHannah MoreMental hygieneMaster's Dissertation