PROGRESS in endoscopy during the past two years has been marked by an improvement in diagnostic methods. These, in turn, have been aided by the use of new instruments. It seems fitting that this article should be devoted to a survey of the technical advances and to a re-emphasis of some of the important aspects of endoscopy.BronchoscopyThis is such a well established procedure in the diagnosis and treatment of bronchopulmonary disease that one might think there would be little that was new to report. However, improved technic by the use of the Broyles‡ bronchoscope makes the introduction of . . .