Studies are based on aD issertation -- which the author submitted to theS pecial Board forM oralS ciences of the University of Cambridge, in 1900, and for which he was awarded aC ertificate of Research certifying the work to be of Distinction as an original contribution to learning. The substance of theD issertation has been considerably amplified in the following pages, which it is hoped may be of service in the elucidation of a rather obscure subject. The author gladly avails himself of this opportunity to acknowledge gratefully his indebtedness toP rof. James Sully, Prof. James Ward and Dr J. N. Keynes for their kind encouragement and help.(Typographical errors above are due to OCR software and don't occur in the book.)About the Publisher Forgotten Books is a publisher of historical writings, such as: Philosophy, Classics, Science, Religion, History, Folklore and Mythology.Forgotten Books' Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the aged text. Read books online for free at www.forgottenbooks.org