A SYSTEM OF PRACTICAL MEDICINE. BY AMERICAN AUTHORS. EDITED BY WILLIAM PEPPER, M.D., LL.D., PROVOST AND PROFESSOR OF THE THEORY AND PRACTICE OF MEDICINE AND OF CLINICAL MEDICINE IN THE UNIVERSITY OF PENNSYLVANIA. ASSISTED BY LOUIS STARR, M.D., CLINICAL PROFESSOR OF DISEASES OF CHILDREN IN THE HOSPITAL OF THE UNIVERSITY OF PENNSYLVANIA. VOLUME V. DISEASES OF THE NERVOUS SYSTEM. PHILADELPHIA: LEA BROTHERS & CO. 1886. Entered according to Act of Congress, in the year 1886, by LEA BROTHERS & CO., in the Office of the Librarian of Congress at Washington. All rights reserved. WESTCOTT & THOMSON, _Stereotypers and Electrotypers, Philada._ WILLIAM J. DORNAN, _Printer, Philada._ VALEDICTORY. In presenting to the profession the fifth and concluding volume of the “SYSTEM OF PRACTICAL MEDICINE BY AMERICAN AUTHORS,” the Editor may be permitted to refer briefly to labors which for years have called forth his strenuous endeavors. The original prospectus of the work was issued in 1881. The first volume was published in January, 1885; the second, in May, 1885; the third, in September, 1885; and the fourth, in February, 1886. In view of the delays inevitable in large and complicated literary enterprises, such unusual punctuality reflects credit alike on the zeal of the contributors and the energy and resources of the publishers. The duties of the Editor have been lightened and rendered agreeable by the unvarying courtesy and cordial co-operation of all connected with him in the undertaking; and he has been amply rewarded by the realization of his hopes in the favorable reception accorded to the successive volumes by the profession on both sides of the Atlantic. The plan of the work has been strictly adhered to, and the articles promised have been furnished without exception, although in a very few cases circumstances required a change in the authorship. Special mention is due to Dr. Louis Starr and to Dr. Judson Daland for the very valuable assistance they have rendered. The only alloy to the pleasure which the Editor has had in the progress of the work has been the removal by death of so many of his distinguished collaborators: such men as Flint, Van Buren, Armor, Bemiss, and Elsberg will long be mourned by the profession. The number of articles is 185, written by 99 authors, covering, with indexes, about 5600 pages, and throughout its whole extent the original purpose has been kept constantly in view, that the practical character of the work should adapt it specially to the needs of the general practitioner. In conclusion, the Editor feels that it is a subject of congratulation that through the combination of so many leading members of the profession it has been rendered possible to present in this work, for the first time, the entire subject of practical medicine treated in a manner truly representative of the American School. PHILADELPHIA, JUNE, 1886. CONTENTS OF VOLUME V.