. 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 . 2,^1^- <^ Fig. 52. Full size of radiograph of pins inserted into cork at various distances troni the vacuumtube and plate respectively. The figures in black give the distance of the plate from the tube; thosein white, the distance of the pins from the plate (in inches). 68 THE ROENTGEN RAYS IN MEDICINE AND SURGERY first examination, so that these same positions may be renewed at thesecond or third examination.

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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondonmacmillancol