A year ago the writer had a period of fortunate misfortune. His left ear had for a time a slight tinnitus with slight lowering of hearing acuity. It enabled him to institute a series of simultaneous experiments on a normal and on an abnormal ear. He thus has been enabled on his own person to confirm or refute statements made by others concerning tinnitus and its allied states and to institute comparison between effects of similar causes in healthy and in unhealthy ears.
This tinnitus, it should be stated, was caused by tubal edema. This is known not only by self-inspection of the pharyngeal orifice of the tubes, but by palpation, so to speak, of the tube by means of the tongue thrust into the post-nasal space. The writer is able to insert the tip of his tongue into the nasopharynx even to the vault of that cavity, and so