Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Equal signs “=” before and after a word or phrase indicate =bold= in the original text. Illustrations and tables have been moved so they do not break up paragraphs. Small capitals have been converted to SOLID capitals. Typographical and punctuation errors have been silently corrected. COPYRIGHT 1920 BY THE UNIVERSITY OF CHICAGO All Rights Reserved Published January 1920…
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