lamps with longebonite handles are now made to obviate this risk. Aprons ofheavy rubber should be worn by operators who spend much timenear x-ray tubes. Focussing Diaphragms.—The sharpness of a photograph of * Messrs. Gent of Leicester. f Watson and Sons, High Holborn. 94 THE RONTGEN HA YS IN… … short tube of lead or heavy glass, as this has a better effect thana disc in sharpening the image. The tube-shield shown in Fig. 57acts very well in improving the focus of a>ray photographs. THE ELECTRICAL APPARATUS 95 Lamps for Negatives.—For the examination or the exhibitionof negatives a…
X-rays · Radiography
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