Produced by Curtis Weyant, Sankar Viswanathan, and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by Case Western Reserve University Preservation Department Digital Library) In this little book I have endeavoured to maintain the simplicity which is the ideal of this series. It is more difficult, however, to be simple in a topic which, even in its illustrations, demands of the reader more or less facility in the exploration of his own mind. I am persuaded that the attempt to make the matter of psychology more elementary than is here done, would only result in making it untrue and so in defeating its own object.…
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