Pediatrics. . No. IV C. W., aged seven. Fracture of right femur. Firm union. Skiagraphtaken ten months after injury. Antero-posterior view. these details that has thrown discredit upon the reliability of cer-tain skiagraphs; it is not the fault of the X-ray, it is entirely thefault of the X-ray operator. FRACTURE OF THE FEMUR 549 As it requires some experience to interpret properly the sig-nificance of the different shadings found in an X-ray picture, Itake the liberty of briefly explaining the skiagraphs in the orderin which they are No. V. A. G. S., aged six. Fracture of left fe
Pediatrics. . No. IV C. W., aged seven. Fracture of right femur. Firm union. Skiagraphtaken ten months after injury. Antero-posterior view. these details that has thrown discredit upon the reliability of cer-tain skiagraphs; it is not the fault of the X-ray, it is entirely thefault of the X-ray operator. FRACTURE OF THE FEMUR 549 As it requires some experience to interpret properly the sig-nificance of the different shadings found in an X-ray picture, Itake the liberty of briefly explaining the skiagraphs in the orderin which they are No. V. A. G. S., aged six. Fracture of left femur. Fragments wired. Firmunion. Skiagraph taken eight months after injury. Lateral view. No. I shows the typical appearance of an oblique fracture ofthe upper third of the femur and is a lateral view of the first casereported by Dr. Perkins. The lower fragment is usually drawn 550 I. B. PERKINS up behind the upper by the action of the hamstrings, rectus,tensor vaginae femoris and the adductors, the latter group beingchiefly instrumental in carrying it to the inner side. The lowerend of the upper fragment is tilted forward and outward by thepushing up of the lower fragment assisted by the action of theiliopsoas muscle, thus producing an angular deformity. The an-gular deformity in this case is well marked. We notice that theintervening space between the fragments is filled by a shadow ofless density than the bones, but greater than that of the muscles,and in this sjiadow we see several much lighter spots. The firstshadow referred to repres
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