. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . Fig. 332. Roy H., fifteen years old. Osteomyelitis; abscess; thickened tibia. Radiographta^en January 5, 1901. Antero-posterior view. Operation done by Dr. Burrell, January 21, enlarged ; no dead )STi.;. Fig. 333. Roy H. Lateral view. Radiograph taken January 5,1901. \<^^.^ ^ ^^ DISEASES OF THE BONES AND OF THE JOINTS 575 Tuberculosis of the Bones. — Tuberculous bones, in many cases atleast, are lighter than normal ones. The o
. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . Fig. 332. Roy H., fifteen years old. Osteomyelitis; abscess; thickened tibia. Radiographta^en January 5, 1901. Antero-posterior view. Operation done by Dr. Burrell, January 21, enlarged ; no dead )STi.;. Fig. 333. Roy H. Lateral view. Radiograph taken January 5,1901. \<^^.^ ^ ^^ DISEASES OF THE BONES AND OF THE JOINTS 575 Tuberculosis of the Bones. — Tuberculous bones, in many cases atleast, are lighter than normal ones. The outlines of tuberculous joints,and .especially the ends of the bones near them, are less defined thannormal. The cause of the lighter shadow appears to be the result ofa diminished amount of inorganic salts in the diseased bones. Thissubject, tuberculosis of the bones, will be further discussed underjoints. Syphilitic Disease. — Reference will be made to the use of theX-rays in this disease under joints. Rickets. — This disease affects the bones during prohferation of the cartilage cells leads to an enlargement of theepiphyses, and the cartilage is lacking in its normal amount of calca-reous matter. The X-rays show that in rickets the bones are less densethan normal and that their shape is altered. A comparison of the fol-lowing an
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