There can be no question that of late years diseases of the sinuses adjacent to the nose have been distressingly common. Case after case appeals to us for aid, all of the different sets of cavities show liability to involvement, and the processes of inflammation and suppuration are represented in a wide range of their typical manifestations. If the ultimate consequences of sinus disease were trivial and its natural course one which led to speedy recovery we might perhaps be pardoned for regarding it optimistically, and for leaving its care to the healing forces of Nature. Unfortunately, however, there is no class of disorders which calls more urgently for relief, nor which if neglected creates more wide-spread and disastrous ruin. The extensive and irreparable destruction of important parts, suffering of unparalleled severity, long-continued invalidism and nervous depression—these and many other evils may easily result from the diseases in question.