Beale, Lionel S. (Lionel Smith), 1828-1906 · London, Harrison · leaf 72
[To face (i:i:,-e LJD.J WITH THE MICEOSCOPE. 21 S5 Bulls-eye Condenser—2. By condensing the light uponthe object by means of a large simple plano-convex lens, or bulVs-eye condenser (Figs. 49, 50, Plate XVI), or when very high powersare required, by a combination of two lenses,…
Microscopy
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