H. Paresis lighted up by “gassing”? (de Massary) 414 I. Epilepsy in a neuropath lighted up by syphilis acquired at war. (Bonhoeffer) 415 J. Syphilitic—after Dixmude epileptic. (Bonhoeffer) 417 K. Syphilitic root-sciatica in a fireworks man. (Dejerine, Long) 418 L. Paresis lighted up in civilian by domestic stress of the war. (Percy Smith) 420 M. Shell-shock pseudoparesis. (Pitres and Marchand) 421 N. Shell-shock pseudotabes. (Pitres and Marchand) 424 SECTION VII. SUMMARY AND KEY 427 APPENDICES: A. The six tests 471 B. Common methods of treatment 486 INTRODUCTION It is a privilege to be allowed to write a word of introduction to a textbook which so richly fulfils its function as does this volume on the manifold disorders classified under Neurosyphilis, a subject of which the importance for the welfare of society is found to loom the larger the more deeply its mysteries are probed. The case histories with which its pages are so amply stocked are carefully analyzed in accordance with a broadly chosen plan, and the generalizations that precede and follow them are obviously based on a wide and varied personal experience such as alone could render a familiarity with the literature of the subjects treated adequate to its best usefulness. Both writers were indeed well adapted for this task. Dr. Southard, as everyone is aware, has long been a highly conscientious, ardent and productive worker in the department of pathological anatomy, and of late years a careful student of clinical diagnosis and methods, both at the Danvers State Hospital and still more, at the Psychopathic Hospital which he worked so hard to found; while Dr. Solomon’s researches, in the special field of neurosyphilis, have been of the highest order. Undoubted as are the merits of the case-system of instruction that has been so much in vogue in recent years, and excellent as is the modern supplementation of this method by the use of published records, the danger is still real that the student will have presented to him a picture of nature in disease that is too diagrammatic, too concise, with the result that while the task of memory is lightened through simplified formulation, the training of the doubting and inquiring instincts is often given too little stimulus and scope. In this book this danger is deliberately met through the casting of emphasis rather on the pluralistic aspects of the processes at stake than (primarily) on their unitary aspects.