File:A manual of practical medical electricity - the Röntgen rays and Finsen light (1902) (14760676036).jpg

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Identifier: manualofpractica00turn (find matches)
Title: A manual of practical medical electricity : the Röntgen rays and Finsen light
Year: 1902 (1900s)
Authors: Turner, Dawson
Subjects: X-Rays Electrophysiology Electrosurgery Electric Stimulation Therapy Electrotherapeutics X-rays Electrophysiology Electrosurgery
Publisher: New York : William Wood & Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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u o izo H < op Q15 He also found that if the current in the primary besuddenly increased or diminished, as by inserting or with-drawing plugs in a box of resistance coils (Figs. 66 and Faradic Electricity III 67), similar momentary currents will be induced in thesecondary. These effects can be enormously magnified if we multiplythe primary and secondary wires by coiling them, well in-sulated from each other, on a cylinder (Figs. 69 and 70). Further, the more rapidly the magnet or the primary
Text Appearing After Image:
Fig. 66.—Current in Opposite Direction at Closing. coil is made to approach to and recede from the secondarythe stronger will be the induced current. If a core of soft iron be placed within the primarycoil, it will be found that the induced current is againstrengthened, for as the core becomes magnetized by thecurrent in the primary, we are now adding on to the in-ducing action of our primary current the inducing actionof a magnet also. (The permeability of the iron coreleads to a concentration of the magnetic lines of force.) 112 A Manual of Practical Medical Elfxtricity The current that is induced in the secondary circuit isin the opposite direction to the primary current at making,but in the same direction at breaking. K glance at the two diagrams (Figs. 66 and 67) willmake this plainer ; the circuit P is the primary one, andit includes a battery, a galvanometer, and a key. The

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  • bookid:manualofpractica00turn
  • bookyear:1902
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:Turner__Dawson
  • booksubject:X_Rays
  • booksubject:Electrophysiology
  • booksubject:Electrosurgery
  • booksubject:Electric_Stimulation_Therapy
  • booksubject:Electrotherapeutics
  • bookpublisher:New_York___William_Wood___Company
  • bookcontributor:Francis_A__Countway_Library_of_Medicine
  • booksponsor:Open_Knowledge_Commons_and_Harvard_Medical_School
  • bookleafnumber:134
  • bookcollection:medicalheritagelibrary
  • bookcollection:francisacountwaylibrary
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014

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