principal optic axis of the microscopeand of the eye. Cr. Cortieaofthe eye. L. Crystal-line lens of the eye. R. Ideal refracting surface atwhich all the refractions of the eye may be assumedto take place. Hold the simple microscope directly toward the sun and move itaway from and toward a piece of… … Fig. 17.Tripod Magnifier. point represents approximately the principal focus (Figs. 10, 11). With-out changing the position of the paper or the magnifier, look into themagnifier and note that the letters are very in-distinct or invisible. Move the magnifier a cen-timeter or two farther from the…
Microscopy
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