arise from territory which is in the dentist's domain. It is always advisable to cooperate heartily with members of the medical profession, and the dentist, when asked, as is often the case, concerning physical ailments, should promptly refer the patient to the physician. Indeed, the dentist is often most favorably situated to be of service to his patient by recognizing general pathological disturbances in the condition of the mucous membrane of the mouth and the tongue before the patient himself is aware of them.

A sincere effort has been made' to conform to the requirements of a work of this nature by adhering to simplicity, accuracy and comprehensiveness, to make the definitions clear, concise and exact. In many instances synonyms have been freely given, while in some cases, where the definitions could be made clearer, antonyms are given by contrast.

It would take considerable space to acknowledge by name all who have so cheerfully, and often at considerable personal sacrifice, assisted in this work. To all of these the most profound gratitude is hereby expressed. Special acknowledgment is due to those who have furnished the illustrations, to Mr. F. J. Schulte, who has so ably assisted with the preparation of the volume, and to Mr. W. C. Griffith, the President of the publishing company, who has placed at our disposal every possible means to produce a perfect work. To one who has devoted forty five years to purely professional service it is gratifying to find that one may be a business man and yet take a sincere interest in the production of a work of this character because of a consciousness that it will be useful to the advancement of a profession and thus of help to humanity.

Under such pleasant personal relations, though an arduous and severe task, the burden has been materially lightened. If this work is helpful' to the dental student and practitioner, and leads to a better understanding as well as to a standardization of dental nomenclature, thereby enabling the profession to render better service for the benefit of mankind, the editor shall indeed feel amply repaid.