Excerpt from A Work on Special Dental Pathology Devoted to the Diseases and Treatment of the Investing Tissues of the Teeth and the Dental Pulp: Including the Sequelae of the Death of the Pulp; Also, Systemic Effects of Mouth Infections, Oral Prophylaxis and Mouth Hygiene The writing of this book was begun five years ago, and its completion has been delayed in order that I might carry out long lines of experimea work upon several subjects which needed further investigation. In the prosecution of the work, I have continually had the cooperation and advice of my sons, Dr. Carl E. Black, of J ack sonville, Illinois, and Dr. Arthur D. Black, of Chicago, which has been a very efficient aid. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.