Evanston, Ill., Sept. 1, 1906.
To the Editor:
—An article on "The History of the Mastoid Operation," by Dr. Frank Allport, in The Journal, July 14, 1906, contains certain errors regarding the anatomy of the ear that should not be allowed to pass unchallenged.In the first place, the term middle ear is repeatedly confused with the tympanum and the two terms used as synonyms, whereas the cavum tympani is but a part of the series of cavities that make up the middle ear. The middle ear includes all the series of connected cavities extending from the opening of the Eustachian tube in the pharynx to the most remote mastoid cell.In the second place, the antrum is frequently referred to as a mastoid cell. This is not at all the case. The antrum is quite distinct developmentally and pathologically from the so-called mastoid cells and as its scientific name,