ADVERTISEMENT ΤΟ THE SIXTH EDITION. THERE remains but little to add to the Preface to the former edition. Seven years more of clinical observation, and the records of 743 more cases, and of 181 more post-mortem examinations, making in all nearly 2,000 cases, and nearly 600 post-mortem examinations, have, it may be hoped, enabled me to add something to the value of the work. I have striven not to increase its bulk, and have omitted much that seemed to me less important, in order to obtain space for the introduction of additional matter which appeared to me of greater moment. In spite, however, of all my pains, this volume is bigger than its predecessor by more than thirty pages. An Italian translation, accompanied with notes, was published by Dr. Blasi of Rome in the year 1869; a second edition is now in preparation. Causes which it is not worth while to mention having interfered with the publication of the French translation of the former edition; the present is in the most competent hands of Dr. Archambault, Physician to the Hôpital des Enfants Malades. Any one in his fifty-eighth year must feel it very doubtful whether his life will be so prolonged as to allow him to take part in the publication of another edition of a book which |