The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 23
e on the retina that theappearance is like a good focus. If onetakes away the card, the beam gets verywide and the eye has only a blurredimpression, the diffusion circles are solarge. § 7a. In case one loses his spectacles or has the accommodation paralyzedby atropin for testing the eyes, it is… … Fig. 7. Pin-hole Card forViewing Near Objects. Lenses The usual and most effective means for increasing the visual anglewhen examining small objects is by the use of lenses, singly or in com-bination. § 8. Lens. — A lens means a mass of transparent glass or othersubstance with one plane and one…
Microscopy · Microscopy -- Technique
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