Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 143
llumination now in general demand byenlarging the angular aperture of their Achromatic Condenser(§ 99). The chief peculiarity of their model consists in the attach-ment both of the Stage and Sub-stage to a large solid brass ring,which is firmly secured to the stem of the instrument. The upperside… … Messes. Becks Laege Miceoscope. [To face p. 91. PLATE VII.
Microscopy · Biology
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