Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 135
The Condenser is made to slide onan arc-piece (as in Mr. Grubbs arrangement, § 72), which is prolonged abovethe Stage for opaque illumination; and with this may be combined a secondarc-piece at right angles to the first, carrying a second Condenser, which isJound serviceable in the resolution of… … Brownings Smaller Stephenson Binocular. analyzer, itis turned on its axisby means of a milled-headso as to bringthe dark-glass surface to the front. Further, by fixing into the armthe tube which carries the objective, with its fine adjustment, andby making that which contains the dividing prisms…
Microscopy · Biology
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