The writings of Adam Politzer on the ear are held in high authority throughout the civilized world, and this text-book has for many years been considered his best. In this edition much space and attention have been given to intra-cranial diseases of otitic origin, such as subdural abscess, otitic meningitis, sinus-phlebitis, etc. The operative treatment of thrombosis of the transverse sinus is, according to the author much simpler than opening of intra-cranial abscess. The operation is thus performed: "After chiseling away the mastoid process, and carefully removing all diseased portions, the sinus is laid free. After this is done one should examine to see if the wall of the vein has the normal dark blue color, or if it is inflamed, thickened, covered with exudate, whether it pulsates or not, and whether it is soft or hard to the touch. Want of pulsation, and resistance leads one to think of