. 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 . orany reason positive pictures are desired they may be obtained byplacing the
. 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 . orany reason positive pictures are desired they may be obtained byplacing the skiagraph in a printing-frame in contact with a plate,and exposing this to the light for the required length of time to pro-duce a good negative. This is then developed, fijced, etc., and, whencompleted, prints obtained therefrom are positives. In Fig. 2 wehave above an ordinary picture printed from a positive skiagraphwhile below is shown a positive print made in the manner de-scribed. IvTaturally the sensitized film must be protected from both ordi-nary light and moisture during its exposure in the mouth, for whichpurpose it must be enveloped in some material which must of itselfbe transparent to the X-ray, and yet possessing these other many cases an envelope may be made of black paper (in whiclithe films or plates come wrapped) with its edges pasted down. Ifthere is danger of moisture (in lower cases, for instance) this may beagain wrapped in water-proof paper or gutta-percha tissue, all of.
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1900, bookidsystemofinst, bookyear1902
