Image from page 346 of "The science and practice of dental surgery" (1914)

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Identifier: sciencepracticeo00benn
Title: The science and practice of dental surgery
Year: 1914 (1910s)
Authors: Bennett, Norman Godfrey, Sir, b. 1870 Henderson, P. B
Subjects: Dentistry Surgery, Oral
Publisher: New York : W. Wood
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
ark t-n s, and in that way may be a usefulmeans of educaticn, both to the dental surgeonand to the public ; but anyone who really under-stands surgical cleanliness, can just as easily i keep a dark object in a clean condition as a ] light on. Artificial.— In most localities artificial lightwill be requind at some time or other. Inas- 22 323 much as the intensity, position, and size of theilhiminating agency, can be controlled, thereneed be no difficulty in getting a light satis-factory for \\ork. Here again the same rulesmust be followed in the matters of sufficiency anddiffusion of light, and relative brightness of theoperation field. Most of the methods of arti-ficial lighting in common use transgress theserules to some extent. If the source of lightbe a single lamp, or several close together, therewill be insufficient diffusion of light, and theoperator will experience difficulties from theblackness and definition of the shadows; hewill be constantly getting in his own light, and

Text Appearing After Image:
Fig. 413. moreover A\ill find that even with a brilliantlamp it \\i!l be difficult to see clearly the detailsof his work, especially if he is doing a gold filling.\ery often, in order to get intensity of illumi-nation, the lamp is brought too close to the work,and consequently is liable to come into theopera tors field of view. Inasmuch as the dentist has arranged boththe chair and his o\\n position in relation to thewindow for daylight work, the ideal artificiallight shoidd also come from the \\-indow, and thatnot from one point of it, but from all the cornersof its upper half, so as to imitate as far aspossible the directions of the rays of daylightthat pass through the window from the sky. By far the best artificial light the \\riter has ever worked by is afforded by six fifty-candle-power glow-lamps, attached to alight rectangu-lar frame 4i ft. broad and 3 ft. high, hung justinside the upper part of the window, and capableof being moved up or down some little distance.The lamps ar

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bookidsciencepracticeo00benn bookyear1914 bookdecade1910 bookcentury1900 bookauthorbennettnormangodfreysirb1870 bookauthorhendersonpb booksubjectdentistry booksubjectsurgeryoral bookpublishernewyorkwwood bookcontributoruniversityofcalifornialibraries booksponsorinternetarchive bookleafnumber346 bookcollectioncdl bookcollectionamericana

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