The purpose of this remarkable book is, apparently, to record the present status of certain obscure but important subjects that have for many years undergone, and are still undergoing, investigations. It is an assembly to date of a work of research: a work that must stamp the investigator and his co-workers as scientists of a high order. Only pathologic conditions of the nose that are not common and are not well understood come under the author's view. Thus all frankly suppurative conditions of the paranasal cells are left out of the discussion. The subject-matter is made up of three main subjects, and these are supplemented by illustrative case histories.
"Vacuum frontal headaches," resulting from complete closure of the frontonasal duct, with or without active inflammatory processes, are, through diagnostic, anatomic and pathologic studies, placed seemingly on a foundation of quite clear understanding. The author speaks of six ways in which