. 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 . £33/e IPneamojiiaMarch 6 120. Essie L. March 6. Second X-ray tracing. Broken line shows position of darkened areain expiration; full line in inspiration. Right heart in normal position. (One-third life size.) I90 THE ROENTGEN RAYS IN MEDICINE AND SURGERY March 23. The third X-ray examination (no cut given) showed thelungs comparatively clear on both sides. It will be seen from the following case how an X-ray examinationmay assist in distin

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. 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 . £33/e IPneamojiiaMarch 6 120. Essie L. March 6. Second X-ray tracing. Broken line shows position of darkened areain expiration; full line in inspiration. Right heart in normal position. (One-third life size.) I90 THE ROENTGEN RAYS IN MEDICINE AND SURGERY March 23. The third X-ray examination (no cut given) showed thelungs comparatively clear on both sides. It will be seen from the following case how an X-ray examinationmay assist in distinguishing a pneumonia in the lower part of the chestfrom a pleurisy with effusion, though some of the physical signs mayfavor the latter diagnosis. Case II. Joseph S., seventeen years old, entered my service at thehospital April 29, 1899. Diagnosis: pneumonia. He had a chill two days before entrance ; much cough and expectora-tion; pain in the left side, worse on deep inspiration; headache;

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