Identifier: radiographyxrays00bott (find matches)
Title: Radiography and the 'X' rays in practice and theory : with constructional manipulatory details
Year: 1898 (1890s)
Authors: Bottone, Selimo Romeo
Subjects: Electric radiation X-rays X-Rays Radiography
Publisher: London New York : Whittaker & Co.
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Whether these two latter forms are really advantageousin practice is doubtful, except only where an intenseeffect is required to be localised over a small area, sincemore coils, or more E.M.F. is needed, than is the casewith the single cathode forms. No. 28 shows a formof tube in which a vacuum regulating bulb is added tothe main tube; this bulb may contain some substancewhich has the power of occluding the gas in which thevacuum is produced. In general behaviour it resemblesNo. 10, but it has the defect of becoming rapidly heated.The form shown at No. 29 is designed with the intentionof concentrating the cathodic rays to a point. This is 70 HADluaUAllIY offccted l>y givinj^an annular form to the cathode, whichis made in the sliape of a llat ring of sheet ahnniniunisurroundin^j; the conical central i»latinuni anode. No. iiOis designed to Hhow the efTect of the reflection of theanode rays in as small a space as possihle. This tuheis also ))rovided with a palladium electrode. A form
Text Appearing After Image:
Firt. 23.—JorNTFD Stam> which has heen found to give exceptionally good resultswith fluorescent screens, owing to the large area evenlycovered by the reflected rays, from the large annularsurface, is figured at No. 31. No. 32 represents the tubeof the form originally employed bj- Rontgen in hisclassical researches. Nos. 1, 2, and 20 are known as«Crookes tubes, Nos. 3, 5, 7, 9, 11, 13, 16, 17, 18, 21, CBOOKES TUBES 71 22, 23, 29, and 81 are due to M. Se^niy; No. 1 is the* Wood tube. No. 6 was devised by MM. Chaband andKurmuzescu. No. 8 is of the well-known Jackson, or Focus type. Nos. 10 and 14 are of the DArsonvaltype. No. 12 is the Puluj tube ; 15, 26, and 27 are

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