File:Dental and oral radiography - a text book for students and practitioners of dentistry (1916) (14570793627).jpg

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Identifier: dentaloral00mcco (find matches)
Title: Dental and oral radiography : a text book for students and practitioners of dentistry
Year: 1916 (1910s)
Authors: McCoy, James David
Subjects: Radiography, Dental X-rays Teeth Mouth
Publisher: St. Louis : Mosby
Contributing Library: West Virginia University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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Fig. 19.Medium-sized high frequency coil. then carried to a condenser. As the currentleaves the condenser it is oscillating at a greatrate of frequency and passes into the primary of X-RAY MACHINES 57
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Fig. 20.Large type high frequency coil. 58 DENTAL AND ORAL RADIOGRAPHY the Tesla or second coil where it induces a cur-rent in the s lary of this coil From the ter-minals of the last secondary, it is carried to thex-ray tube. The principles involved in this type apparatus are shown in Fig. 17. Like the current of the induction coil, the cur-rent from the Tesla coil is high in voltage andlow in amperage, but unlike the current from theinduction coil it is not uni-directional, but is al-ternating in character. Fur this reason, it is con-g ered by some as being less desirable for radi-ographic purposes. However this apparently ob-jectionable feature is overcome by using an x-raytube constructed in such a way as to cut out onewave of the current and thereby produce practi-cally the same result as where an uni-directionalcurrent is used. These coils have the advantage of being lesscumbersome, require less space and are less ex-pensive than the other form of apparatus, but theycannot be dep

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Flickr tags
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  • bookid:dentaloral00mcco
  • bookyear:1916
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:McCoy__James_David
  • booksubject:Radiography__Dental
  • booksubject:X_rays
  • booksubject:Teeth
  • booksubject:Mouth
  • bookpublisher:St__Louis___Mosby
  • bookcontributor:West_Virginia_University_Libraries
  • booksponsor:LYRASIS_Members_and_Sloan_Foundation
  • bookleafnumber:60
  • bookcollection:west_virginia_university
  • bookcollection:americana
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27 July 2014

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