. 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 . d is closed at one end but open at the other, so that astream of water may be kept running through it, or a current of air maybe driven through it, and thus the target is prevented from becominghot and being destroyed. So far as I am aware, this is the only form oftarget that will withstand extreme amounts of electric energy. Thesecond is a rotary target (see Figs. 28, 29), and is supported on a pivot inits centre, so that if one part of the targe
. 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 . d is closed at one end but open at the other, so that astream of water may be kept running through it, or a current of air maybe driven through it, and thus the target is prevented from becominghot and being destroyed. So far as I am aware, this is the only form oftarget that will withstand extreme amounts of electric energy. Thesecond is a rotary target (see Figs. 28, 29), and is supported on a pivot inits centre, so that if one part of the target is destroyed by having a smallhole melted in it, a slight shaking of the tube will bring another portion 36 THE ROENTGEN RAYS IN MEDICINE AND SURGERY of the target into the focus of the discharge from the cathode. In athird form, Fig. 24, the target was made concave in the hope thatthis form would collect the X-rays that would otherwise be lost. Inthese tubes the supports of the terminals are strong stems of metal,and the glass wrappings (see Fig. 30) are dispensed Focus Tubes for Use with the Direct Current. A-W-L X-LIGHT Fig. 26. Cooled target tube. The tube is 43 centimetres long. (Rollins A-W-L X-LIGHT TUBE.
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