The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 317
thusobscure the image, or on the other hand the terminal beam could beopened up to make the aperture greater, the eye could discriminatebeyond the limits heretofore ascribed to it (Wright, Ch. XVI). As the higher the power of the ocular the smaller is the eye-point(fig. 23-24), it is evident that… … Fig. 180. Effect of Aperture on Definite Focus and on Overcoming Opacities. (From Wrights Principles of Microscopy, p. 77). (1) To show the definiteness of the focus (/) with a large aperture. Eitherabove or below this is a large diffusion circle (a b) due to the size of the section ofthe aperture.…
Microscopy · Microscopy -- Technique
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