. Radiography and radio-therapeutics . Fig. 89.—Tube-box with Fig. 90.—Tube-bo.\ witli rectauguhirdiaphragm. ■centre of the box. The tube-holder can be fixed by turning the wood screwto the right. 7 98 RADIOGKAPHY In order that neither the operator nor the patient may receive shocksdue to sparks jumping from the tube to any part of the stand, a terminalis mounted on the pedestal, which is connected with all the metalparts of the stand, and also with the accessories, which are inserted inthe front opening of the box through the metal strip which runs alongthe tube-box. This te
. Radiography and radio-therapeutics . Fig. 89.—Tube-box with Fig. 90.—Tube-bo.\ witli rectauguhirdiaphragm. ■centre of the box. The tube-holder can be fixed by turning the wood screwto the right. 7 98 RADIOGKAPHY In order that neither the operator nor the patient may receive shocksdue to sparks jumping from the tube to any part of the stand, a terminalis mounted on the pedestal, which is connected with all the metalparts of the stand, and also with the accessories, which are inserted inthe front opening of the box through the metal strip which runs alongthe tube-box. This terminal must be connected to a water-pipe by meansof an insulated or bare wire, or to an earthed conductor, should this be avail-able on the supply mains. In order to prevent any accidental movement of the stand, two screwsare provided in the pedestal by means of which the latter may be slightlyraised, so as to put two castors out of gear. Accessories.—The following accessories are generally supplied withthese tubes. 1. A wooden Carrier with an opening (about 170 x 170
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