Identifier: dentalcosmos4919whit (find matches)
Title: The Dental cosmos
Year: 1907 (1900s)
Authors: White, J. D McQuillen, J. H. (John Hugh), 1826-1879 Ziegler, George Jacob, 1821-1895 White, James William, 1826-1891 Kirk, Edward C. (Edward Cameron), 1856-1933 Anthony, L. Pierce (Lovick Pierce), b. 1877
Subjects: Dentistry Dentistry
Publisher: Philadelphia, S. S. White Dental Manufacturing Co
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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ocusat any one time. By means of the twoseparate objectives Greenough has overcomethis difficulty to a large extent, and objectswhich under an ordinary microscope can onlybe seen in sections by focusing down fromthe top, are under this marvelous new instru-ment visible in their entirety. In dental ex-aminations this feature is of the very firstimportance, because it is the relation of theform and size, rather than the character, of BOWLES.—A NEW ADAPTATION OF THE MICROSCOPE TO DENTISTRY. 35fJ a flat but small section of a cavity, that is electric light and a reflector that throws a important. The instrument has the most remarkableworking distance of any microscope known ;in fact, this point alone is what at first at-tracted my attention to its possibilities in den- beam of light on the precise spot that theobjectives are focused on, thus illuminatingit perfectly. The eyepieces are quite asadjustable as are those of the Z<-iss field-glasses, so that by moving them back and Fig. 1.
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tistry. With objectives that magnify fromeight to sixty-five diameters—that is. whichare four to thirty times as strong as tlxhand magnifiers that dentists usually employ—a distance of from an inch and a half tofour inches intervenes between the objectiveand the teeth. This distance is enough toallow any of the ordinary dental instrumentsto be used. There is attached to this microscope a small he fields of vision can be made to ap-pear as one single field. The instrument is light and easily ma-nipulated, requiring little of the techniquewhich the old microscopes demanded, and al-ready it has entered the field of the plant -hybridizer, and is being used by gardenerswho never in their lives saw through theordinary microscope. In botany—especially in the study of plant 360 THE DENTAL COSMOS. diseases—ii has quickly become invaluable:while in metallurgy, zoology, and in manyother branches, it is rapidly becoming quite.i- necessary an instrument of research as isthe old microscope.

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