These accidents often happen where no surgical aid can be conveniently procured. Any one can easily detect a broken bone by the person not being able to raise the limb, by its bending where it ought no, by pain, and by crepitation, or crackling sound if the parts are moved. When the bone is merely separated into two parts it is called a simple fracture; when an open wound communicates with the fracture it is called compound; when the bone is broken into numerous fragments, it is termed comminuted, and complicated when attended with dislocation, laceration of large vessels, etc.