7. =Examination of Nose and Neighboring Cavities.= Of all the methods advised for the examination of the nasal cavities the method of _Harke_ (Fig. 32) is the easiest and gives the best views of the nasal tract. After the brain has been removed the scalp incision is carried downward to the middle of the neck on both sides, following the anterior edge of the trapezius, as for the removal of the temporal bone. The anterior flap is then carried forward as far as the bridge of the nose and the edges of the orbits, and the flap pulled down over the face. The posterior flap is carried back as far as the upper cervical vertebræ, removing the muscles with the scalp. The head of the cadaver is now raised and firmly held by an assistant or clamped in a head-holder; and with the large meat-saw the occipital bone is sawed through in the median line, cutting first the squama and then the clivus. The saw is then set anteriorly into the frontal bone, to the left or right of the septum, in order not to injure the septum narium. (Fig. 32.) The sawing then proceeds through the sella turcica, body of the sphenoid, ethmoid and frontal bones until the base of the skull is divided into halves. The cartilage-knife is then introduced through the foramen magnum and the basal ligaments cut. The right and left sides of the skull posteriorly are then taken in the two hands and with a quick, powerful tug forced outward until the nasal bones, hard palate and alveolar processes break apart. The two halves of the base of the skull then open like a book, turning on an axis, running through the inferior maxillary articulation and the occipito-atloid ligaments. If there is too great resistance in the region of the foramen magnum, the anterior and posterior arches of the atlas may be cut with a chisel. The sphenoidal sinus, septum narium, frontal sinus and the nasal cavity on one side of the septum with the nasopharynx are thus exposed, and their walls and contents may now be examined. Material for bacteriologic examination should be secured before further cutting is done. The septum may then be removed with forceps and scissors, the nasal cavity on the other side examined, the nasopharynx inspected, and the antrums opened with small bone-forceps. After the examination is complete the halves of the base are brought together and fastened with copper wire anteriorly and posteriorly, taking care that the anterior wire will not be visible through the skin of the forehead.