. Elements of applied microscopy. A text-book for beginners. Microscopy. 28 ELEMENTS OF APPLIED MICROSCOPY. phragm is to cut off adventitious light so that all the rays finally reaching the microscope shall come from the immediate vicinity of the object. A little experimentation will show that reducing the diaphragm opening often gives a sharper picture as well as one much less trying to the eyes; in general an opening about the size of the â front lens of the objective will yield good Fig. 19.â^Abbe Condenser. (After Hager-Mez.) Certain opaque objects are best examined by reflected
. Elements of applied microscopy. A text-book for beginners. Microscopy. 28 ELEMENTS OF APPLIED MICROSCOPY. phragm is to cut off adventitious light so that all the rays finally reaching the microscope shall come from the immediate vicinity of the object. A little experimentation will show that reducing the diaphragm opening often gives a sharper picture as well as one much less trying to the eyes; in general an opening about the size of the â front lens of the objective will yield good Fig. 19.â^Abbe Condenser. (After Hager-Mez.) Certain opaque objects are best examined by reflected light, and in many cases this method may well be used to supplement the ordinary one, the mirror being turned aside so that no light passes through the stage and the object being illuminated either with the light which nat- urally falls on it or with rays concentrated from above by a lens or mirror. 3. Focusing.âAfter the field is well lighted, the next step is to focus on the object, or to so adjust the relation pf the lens systems that a clear image may be Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Winslow, C. -E. A. (Charles-Edward Amory), 1877-1957. New York, J. Wiley; London, Chapman & Hall
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