An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 646
Fig. 431. — Radiographic apparatus arranged for use in a dental hospital.(Photographic film inside patients mouth.) ROENTGEN RAYS AND OTHER RAYS 575 … Fig. 432. — Radiograph of teeth showing an abscess (dark spot) on root of tooth. White areas in lower part of picture showfillings. and operating chair. The patient is about to have a radio-graph taken of the interior of his jaw. Such photographs(Fig. 432) are taken for the pur-pose of locating…
Electricity · Magnetism
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