. The microscope : an introduction to microscopic methods and to histology. Microscopes. ] MICROSCOPE AND ACCESSORJES Flt>s. 33, 34, 35 are somewhat modified from Ellenberger, and are introduced to illustrate the relative amount of utilized light, with dry, zvaler immersion and homogeneous immersion objectives of the same equivalent focus. The point from which the rays emanate is in air in each case. If Canada balsam were beneath the cover-glass in place of the air there would be practically no refraction of the rays on entering the cover-glass (§21). Fig. 33. Showing the course of the
. The microscope : an introduction to microscopic methods and to histology. Microscopes. ] MICROSCOPE AND ACCESSORJES Flt>s. 33, 34, 35 are somewhat modified from Ellenberger, and are introduced to illustrate the relative amount of utilized light, with dry, zvaler immersion and homogeneous immersion objectives of the same equivalent focus. The point from which the rays emanate is in air in each case. If Canada balsam were beneath the cover-glass in place of the air there would be practically no refraction of the rays on entering the cover-glass (§21). Fig. 33. Showing the course of the rays passing through a cover-glass from an axial point of the object, and the num- ber that finally enter the front of a dry ^ f? ISp^ ~-^\\\ i//s^ \\\\1 \ll//cove,v Pig. 34. Rays from the axial point of the object traversing a cover of the same thickness as in Fig. 33, and entering the front lens of a water immersion 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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