. Elementary and dental radiography / by Howard Riley Raper . 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. F.^urs S55B.—Special dental X-ray machine. Transformer or Interrupterless type. Size: 17inches wide, 23 inches deep, 37 inrhes high. Figures 355, A and B, and 356 are representative of the dental trans-former type. Figure
. Elementary and dental radiography / by Howard Riley Raper . 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. F.^urs S55B.—Special dental X-ray machine. Transformer or Interrupterless type. Size: 17inches wide, 23 inches deep, 37 inrhes high. Figures 355, A and B, and 356 are representative of the dental trans-former type. Figures 357 and 358 are representative of the dental induction coiltype. The tube on top of Fig. 357 is a valve tube. 1,22 APPENDIX Figure 359 is a dental X-ray machine of the high-frequency coil type. With some types of the high-frequency X-ray coil (Fig. 360) theoperator has at his disposal the high-frequency current for electro-therapeutic work. The value of the high-frequency current as a therapeutic agent in thepractice of dentistry has not been satisfactorily established. I would
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