Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The present study was suggested to me during the session of 1901 - 1902, by Doctor Murray Peabody Brush, of the Johns Hopkins University, whose kindness, encouragement and advice have largely contributed to its completion. Professor Kirby Flower Smith, of the Hopkins, and Professor Frederick M. War ren, of Yale University, have also given me ample proof of their kindness and willingness to aid in my researches. Work on this study was begun as soon as the subject was suggested, and was continued during the two following sessions at the Hopkins, and.