. The microscope; an introduction to microscopic methods and to histology. Microscopes; 1899. Fig. 43- Fig. 42. Shows that the optic axis of the condenser does not coincide with that of the microscope. (-D). Dia- phragm of the condenser shown at one side of the field of the microscope. Fig. 43 Shows the diaphragm (D) in the center of the field of the micro- scope, and thus the coincidence of the axis of the condenser with that of the microscope. § 78. Centering the Image of the Source of Illumination.—For the best results it is not only necessary that the condenser be properly centered, but th
. The microscope; an introduction to microscopic methods and to histology. Microscopes; 1899. Fig. 43- Fig. 42. Shows that the optic axis of the condenser does not coincide with that of the microscope. (-D). Dia- phragm of the condenser shown at one side of the field of the microscope. Fig. 43 Shows the diaphragm (D) in the center of the field of the micro- scope, and thus the coincidence of the axis of the condenser with that of the microscope. § 78. Centering the Image of the Source of Illumination.—For the best results it is not only necessary that the condenser be properly centered, but that the object to be studied should be in the image of the source of illumination and that this should also be centered (Figs. 44, 45). After the condenser itself is centered the iris diaphragm is opened to its full extent or the diaphragm carrier turned wholly aside. The condenser is then racked up toward the objective until the image of the flame is apparently on the specimen. If this cannot be accomplished the relative position of the lamp and condenser is not correct and should be so changed that the image of the edge of the flame is sharply defined. This image must also be centered. This is easily accomplished by manipulation of the mirror or, if a lamp is used, by changing the posi- tion of the lamp or of the bull's eye (Figs. 34, 52).. 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 Gage, Simon Henry, 1851-1944. Ithaca, N. Y. , Comstock Publishing Company
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