The Röntgen rays in medical work / by David Walsh.

  • Walsh, David.
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: The Röntgen rays in medical work / by David Walsh. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    47/330 (page 39)
    procured .r-rays in greater abundance and yielding much better photographic definition. By his plan the main part of the Eontgen rays is directed to one side of the tube, and hence may be readily thrown upon the object to be investigated, whether by Fig. 17.—Focus Tube for Contimuous Current.* Fig. 18.—Focus Tube for Alternating Current.* the fluorescent screen or by a sensitized photographic surface. Jackson's tube, known as the ' focus ' tube (Fig. 17), consists of a hollow sphere of glass from 2 to 4 inches in diameter. In one * Both these drawings are from 'The Induction Coil in Practical Work,' by Lewis Wright. Macmillan and Co., 1897.