. Elementary and dental radiography / by Howard Riley Raper . paper, from which enlargements were made, and then the halftone. In concluding let me say that the properly made, intelligentlyread single radiographic negative is of the utmost importance and valuein the practice of dentistry. Let us not forget this, and let us not decrythe radiograph because our efforts in stereoscopic and plastic work fail tomake it absolutely infallible. * For a further consideration of dental stereoscopic radiography see Appendix,Chapter X. APPENDIX APPENDIX TO CHAPTER I Electricity To make the meaning of the w
. Elementary and dental radiography / by Howard Riley Raper . paper, from which enlargements were made, and then the halftone. In concluding let me say that the properly made, intelligentlyread single radiographic negative is of the utmost importance and valuein the practice of dentistry. Let us not forget this, and let us not decrythe radiograph because our efforts in stereoscopic and plastic work fail tomake it absolutely infallible. * For a further consideration of dental stereoscopic radiography see Appendix,Chapter X. APPENDIX APPENDIX TO CHAPTER I Electricity To make the meaning of the word phase, used as an electrical term,clear, would require the use of unnecessary space in this volume. The operator need not bother about the phase of his supply it reaches him it is single phase and X-ray machines are always builtfor the single phase current. 3*9 320 APPENDIX APPENDIX TO CHAPTER II XRay machines Some eight or ten special dental X-ray machines have been placedon the market within the past three years. The machines represent, in. Figure 355A.—Special dental X-ray machine. Transformer or Interrupterless type. Size: 24inches wide, 20 inches deep, ~>0 inches high. their construction, the three standard types of X-ray machines, viz., thetransformer, or interrupterless coil, the induction coil and the high-fre-quency coil. X-RAY MACHINES 321
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