It is difficult for students to see what is going on in the larynx or pharynx at the time of direct laryngoscopy. Looking over the shoulder of the laryngologist is not satisfactory. It is possible for the laryngologist and his assistant or other interested persons to see the pharynx and larynx simultaneously with the aid of mirror devices. Lukens'1 "demonstroscope" was apparently a teaching aid for indirect laryngoscopy (Fig. 1). Probably, every teaching center has at times been interested in this problem. For some years we have been using a surgical device which is satisfactory for both the laryngologist and his assistant at the time of suspension laryngoscopy. This device is
shaft which is attached to the headlight by means of a long double-jointed clamp. The mirror is located centrally in front of the reflecting mirror of the headlight and is therefore adjustable in all directions and gives a