. Elementary and dental radiography . Fig. 311. A. B. C, and D are pieces of linoleum. E, a piece of sheet lead 1-16 inch thick. Appliances forProtection. The appliances which may be used for protec-tion against the X-rays are: Protection lead screens(Figs. 314 and 315), protection lead cabinets ( and 317), protection shields for the tube (, 61, 63 and 64, Chapter HI, and Fig. 318), protection or safety X-raytubes (Fig. 319), X-ray proof gloves (Fig. 320), lead glass spectacles(Fig. 321), and protective aprons. DENTAL RADIOGRAPHY. Fig. 818. A. B, C, and l». Bame as in Fig. 811.

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. Elementary and dental radiography . Fig. 311. A. B. C, and D are pieces of linoleum. E, a piece of sheet lead 1-16 inch thick. Appliances forProtection. The appliances which may be used for protec-tion against the X-rays are: Protection lead screens(Figs. 314 and 315), protection lead cabinets ( and 317), protection shields for the tube (, 61, 63 and 64, Chapter HI, and Fig. 318), protection or safety X-raytubes (Fig. 319), X-ray proof gloves (Fig. 320), lead glass spectacles(Fig. 321), and protective aprons. DENTAL RADIOGRAPHY. Fig. 818. A. B, C, and l». Bame as in Fig. 811. I-., a piece of lead glass 1-1 inch thick. From the standpoint of protection for the oper- thc Ccad Screen ator n<-thing is so efficient as the lead screen or cabi- and Cabinet, nel (Figs. 314, 315, 316 and 317). The use of either makes it possible for the operator to protect himself completely from all direct X-rays. The lead used in protective screens and cabinets is usually one-six- THE DANGERS OF THE X-RAY 281

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