Addyman, Frank Thornton · London : Scott, Greenwood & co. · leaf 138
he sameas that of the fluorescing parts of the screen. In a red light,the yellow coating of the screen is invisible, appearing black.Thus the red tubes may be used for screen work in the darkroom without any special precautions being necessary to veilthe fluorescent light which they give out. This… … Plate III.—Kevolver Bullet in Calf of Leg. CHAPTER VI. AIR-PUMPS. An air-pump is more of a luxury than a necessity to the X rayworker. The judicious use of heat brings a variety of effectswithin the powers of a single tube, but the air-pump enables aworker to exhaust a tube to exactly suit his…
X-rays
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