The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 72
, both spherical and chro-matic, are very great in both forms. Indeed, so great are they thatin the best form with three lenses and an illuminating cone of 1.40 Fig. 39. Achrom-atic Substage Con-denser. (From WatsonsCatalogue). 1,2,3 The lens ele-ments making up thecondenser. While thelenses are… … N.A., the aplanatic cone transmitted is only 0.5, and it is the aplanaticcone which is of real use in microscopic illumination where detailsare to be studied. There is no doubt, however, that the results ob-tained with a non-achromatic condenser like the Abbe are much moresatisfactory than with no…
Microscopy · Microscopy -- Technique
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