_Special characters of the symptoms observed, and of the course of healing of the fractures._--Peculiarities in the initial signs may be rapidly passed over. The first depended on the large number of lesions of the bone which were unaccompanied by loss of continuity. In the case of perforations attention to the course of the track, external palpation, and possibly the detection of bone dust in the aperture of exit, were usually sufficient to indicate injury to the bones. When these did not suffice the introduction of a probe would usually set the question at rest; but this is always to be avoided if possible, as adding a fresh item of risk to the wound. The X rays were not always to hand, and are not always capable of giving reliable information in the matter of perforations, although very useful in detecting grooves or notching. The latter injuries are those in which information as to the condition of the bones is often of most interest in view of the characters of the external wounds. Fractures with solution of continuity were, as a rule, easy of detection, but the relative prominence of the classical signs varied somewhat from what we are accustomed to see in civil practice. The first striking peculiarity noted in comminuted fractures of the long bones was the degree of local shock; the limbs were often quite powerless, the muscles flaccid, and common sensation lowered. This was of importance in two ways; firstly, shortening of the limb was often absent as a sign, and, secondly, pain was sometimes not at all pronounced even when the patient was moved. The primary absence of shortening, even persisting for the first two or three days, was a phenomenon always important to bear in mind, as it affected the degree of extension needed in the treatment of the fracture, which, if sufficient at the moment, often proved quite inadequate with the return of tone in the muscles. Secondly, abnormal mobility was usually strongly marked, and this sometimes without very definite crepitus, as a result of the fine nature of the comminution and the displacement of the small fragments.