I am convinced that we all are not always successful in the treatment of empyema of the antrum of Highmore, and consequently we have been obliged to perform a second and more extensive operation. This has taught us the real nature of the disease, and how to thoroughly eliminate the existing trouble. All this may be avoided by a thorough ocular inspection of the maxillary sinus by the antroscope—the endoscope of the antrum.
Two years ago I demonstrated this in a crude state to the San Francisco County Medical Society. I do not need to explain the details of the principles of the endoscope, which are used for illuminating closed cavities, as you are all familiar with them. The endoscope for the antrum is is intended to be used after perforating through the alveolar process or through the fossa canina. It can also be used with the proper curvature through