File:X-ray manual - U.S. Army (1917) (14754124181).jpg

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Identifier: xraymanualusarmy00unit (find matches)
Title: X-ray manual : U.S. Army
Year: 1917 (1910s)
Authors: United States. Surgeon-General's Office American Roentgen Ray Society
Subjects: X-rays Fractures Teeth Chest Heart Radiography
Publisher: New York : Middleditch
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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not make1801 or 1799. Since the rectifier for a 60 cycle currentmust make a quarter-turn each l/120th of a second,the motor must turn at 1800 R.P.M. It must be ob-served that such a motor is designed for a given fre-quency and cannot be expected to work on one greatlydifferent from that intended. Starting. Many motors require connection to a special startingdevice in order to bring them up nearly to the requiredspeed before making the running connection. Do notdelay too long, and do not throw over the switch tooquickly. A little practice will enable you to tell bythe sound of the machine when the speed is about right. Oil. Do not expect a machine to run for long periods with-out lubrication. Follow the makers instructions, if anyare given. Do not use too light an oil. An oil like 3 in 1is good for sewing machines but must not be used onpower motors. Use real machine oil. Protection. It is well to have the field and the armature of anX-ray motor protected from small sparks due to tran-
Text Appearing After Image:
10 20 30 40 50 60 70 80 fO 100 M.A. Fig. 28. Relation of X-ray production on two types of control. AC,heostat voltage current line. Voltage ordinates at the left. DE, correspondingK-radiation, quantity ordinates at the right. AB auto transformer chartIne. DF., corresponding quantity line. Quantity In arbitrary units. Main C3 i ;r

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https://www.flickr.com/photos/internetarchivebookimages/14754124181/

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Flickr tags
InfoField
  • bookid:xraymanualusarmy00unit
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:United_States__Surgeon_General_s_Office
  • bookauthor:American_Roentgen_Ray_Society
  • booksubject:X_rays
  • booksubject:Fractures
  • booksubject:Teeth
  • booksubject:Chest
  • booksubject:Heart
  • booksubject:Radiography
  • bookpublisher:New_York___Middleditch
  • bookcontributor:Francis_A__Countway_Library_of_Medicine
  • booksponsor:Open_Knowledge_Commons_and_Harvard_Medical_School
  • bookleafnumber:72
  • bookcollection:medicalheritagelibrary
  • bookcollection:francisacountwaylibrary
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014

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