File:A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents - a pictorial system of teaching by clinical instruction plates with explanatory text (14753917901).jpg

Identifier: systemofinstruct00mone (find matches)
Title: A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents : a pictorial system of teaching by clinical instruction plates with explanatory text : a series of photographic clinics in standard uses of scientific therapeutic apparatus for surgical and medical practitioners : prepared especially for the post-graduate home study of surgeons, general physicians, dentists, dermatologists and specialists in the treatment of chronic diseases, and sanitarium practice
Year: 1902 (1900s)
Authors: Monell, S. H. (Samuel Howard), d. 1918
Subjects: Vibration X-rays Diagnosis, Radioscopic Thermotherapy Electrotherapeutics X-Ray Therapy Vibration Diagnosis
Publisher: New York : E.R. Pelton
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Text Appearing Before Image:
Plate 193.—This plate shows the sun-lens on the table, and the attendant holding thecompressor on the lesion. A scene in Finsens Institute. It is more than probable that,cheap as sunlight is, when it can be had, yet new strides in vacuum-tube light at low cost willdisplace all other mechanism in photo-therapy. Such a picture as this will become historicaland reminiscent.
Text Appearing After Image:
Plate 194—Finsens Lens for Suas Rays. It is only when light is concentrated in sucha way that it contains as many blue, violet, and ultra-violet rays as possible that its bacteri-cidal property becomes so powerful that it can be used therapeutically with advantage. Toavoid burning the skin it is also necessary to cool the light, and this filtering lens serves thedouble purpose. It consists of a lens of about twenty to forty centimetres in diameter. Thelens is composed of a plain glass and a curved one, which are framed in a brass ring, and be-tween them there is a bright blue, weak, ammoniac^ solution of copper sulphate. As one sur-face of the liquid is plain, the other one being curved, its optical function is that of an ordinaryplain convex glass lens. By making the lens of a blue liquid instead of solid glass a consider-able cooling of the light will be obtained, because water absorbs the ultra-red rays, and becausethe blue color excludes a considerable amount of the red and yell

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