Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 191
rther concentration of the rays already brought intoconvergence by the bulls-eye.—An ingenious and effective modeof using the Bulls-eye condenser, for the illumination of veryminute objects under high-power Objectives, has been devised byMr. James Smith. The Microscope being in position for… … Bulls-eye Condenser. BECKS PAEABOLIC SPECULUM. 137 three inelies. The bulls-eye should be placed between the stageand the lamp, with its plane surface uppermost, and with itsconvex surface a little above the stage. The light entering its-convex surface near the margin turned towards the lamp, falls…
Microscopy · Biology
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