. Elementary and dental radiography / by Howard Riley Raper . scope—i. e., byplacing the right enlargement on the left side of the stereoscope and theleft enlargement on the right side of the stereoscope, with the coated sidesof the negatives still toward the light of the illuminating boxes, or by re-versing the negatives so their sensitive sides present away from the lightof the illuminating boxes toward the operators position of observationbut allowing the right negative to remain on the right side and the lefton the left side—the position from which the operator makes his ob- 434 APPENDIX s
. Elementary and dental radiography / by Howard Riley Raper . scope—i. e., byplacing the right enlargement on the left side of the stereoscope and theleft enlargement on the right side of the stereoscope, with the coated sidesof the negatives still toward the light of the illuminating boxes, or by re-versing the negatives so their sensitive sides present away from the lightof the illuminating boxes toward the operators position of observationbut allowing the right negative to remain on the right side and the lefton the left side—the position from which the operator makes his ob- 434 APPENDIX servation is changed from that of the him during exposure to the positionof the X-ray tube during exposure. The foregoing statements regarding the mounting of negatives onthe stereoscope for observation, and the possibilities of changing theoperators position of observation thereby are difficult to follow. I would,therefore, advise those who wish to take up this work to make test orexperimental cases by stereoscopically radiographing the hand with a coin. Fig. 472. Enlarging apparatus. on it, carrying the hand radiographs through the process of enlargement,and then observing them in different ways in the stereoscope. As I have stated elsewhere stereoscopic work, be- ■SfijHPflfAfiffi cause of its difficulty will remain principally in themethods to Dentistry. ,,./ „, t- r , ■ hands or specialists. Ihe practice of making en-largements renders dental stereoscopic radiography a definite successin cases where heretofore it has been a failure. Stereoscopic work remainstoo expensive to come into general use, but for those who can afford itthe service is worth the fee which must be charged for it. I have heard the statement made repeatedly that the two negativeswhich are exposed simultaneously in the same film packet can be mountedand observed with a stereoscope, and that a stereoscopic effect is may be compelled to change my mind sometime but right now I mav STEREOS
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