The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 28
ocus. § 15. Size of the field. —With any given magnifier, thesize of the field, that is thearea which can be seen, islarger with the eye near themagnifier. Demonstrate this by hold-ing the eye 10 to 20 cm. above the tripod magnifier and noting the number of letters or words whichcan be seen. Then… … Fig. 15-16. Virtual Image with theObject near to and far from the Prin-cipal Focus. /• /> U f The principal foci on the axisabove and below the lens. Lc, Lc The same lens to show the dif-ference in size of the virtual image withthe object near to and far from the princi-pal focus. ep The…
Microscopy · Microscopy -- Technique
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