Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 389
aper-ture are used, because illuminatingcones up to 8 N. A. can be obtained- ffl with good condensers by the method shown in fig. 299. Butwhen the microscope is of necessityused upright the rectangular prismor the plane mirror must be used,fig. 300. The arrangement at fig. 308 is sometimes useful… … Fig. 309. -Same result with concavemirror. j|(»W TO SET UP l>.\KK-GROlNI) ILM M I.NATION 357 In regard to tins last figure it will be understood that (as before)E represents the edge of the flame, l> the bulls-eye, M the minor, 0the condenser under the Stage, and F the plane of tlx- object.…
Microscopy
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